[bsp][stm32] add stm32l053 bsp

bsp/stm32/stm32l053-st-nucleo/.config

+#
+# Automatically generated file; DO NOT EDIT.
+# RT-Thread Configuration
+#
+
+#
+# RT-Thread Kernel
+#
+CONFIG_RT_NAME_MAX=8
+# CONFIG_RT_USING_SMP is not set
+CONFIG_RT_ALIGN_SIZE=4
+# CONFIG_RT_THREAD_PRIORITY_8 is not set
+CONFIG_RT_THREAD_PRIORITY_32=y
+# CONFIG_RT_THREAD_PRIORITY_256 is not set
+CONFIG_RT_THREAD_PRIORITY_MAX=32
+CONFIG_RT_TICK_PER_SECOND=1000
+CONFIG_RT_USING_OVERFLOW_CHECK=y
+CONFIG_RT_USING_HOOK=y
+CONFIG_RT_USING_IDLE_HOOK=y
+CONFIG_RT_IDEL_HOOK_LIST_SIZE=4
+CONFIG_IDLE_THREAD_STACK_SIZE=256
+# CONFIG_RT_USING_TIMER_SOFT is not set
+CONFIG_RT_DEBUG=y
+# CONFIG_RT_DEBUG_INIT_CONFIG is not set
+# CONFIG_RT_DEBUG_THREAD_CONFIG is not set
+# CONFIG_RT_DEBUG_SCHEDULER_CONFIG is not set
+# CONFIG_RT_DEBUG_IPC_CONFIG is not set
+# CONFIG_RT_DEBUG_TIMER_CONFIG is not set
+# CONFIG_RT_DEBUG_IRQ_CONFIG is not set
+# CONFIG_RT_DEBUG_MEM_CONFIG is not set
+# CONFIG_RT_DEBUG_SLAB_CONFIG is not set
+# CONFIG_RT_DEBUG_MEMHEAP_CONFIG is not set
+# CONFIG_RT_DEBUG_MODULE_CONFIG is not set
+
+#
+# Inter-Thread communication
+#
+CONFIG_RT_USING_SEMAPHORE=y
+CONFIG_RT_USING_MUTEX=y
+CONFIG_RT_USING_EVENT=y
+CONFIG_RT_USING_MAILBOX=y
+CONFIG_RT_USING_MESSAGEQUEUE=y
+# CONFIG_RT_USING_SIGNALS is not set
+
+#
+# Memory Management
+#
+CONFIG_RT_USING_MEMPOOL=y
+# CONFIG_RT_USING_MEMHEAP is not set
+# CONFIG_RT_USING_NOHEAP is not set
+CONFIG_RT_USING_SMALL_MEM=y
+# CONFIG_RT_USING_SLAB is not set
+# CONFIG_RT_USING_MEMTRACE is not set
+CONFIG_RT_USING_HEAP=y
+
+#
+# Kernel Device Object
+#
+CONFIG_RT_USING_DEVICE=y
+# CONFIG_RT_USING_DEVICE_OPS is not set
+# CONFIG_RT_USING_INTERRUPT_INFO is not set
+CONFIG_RT_USING_CONSOLE=y
+CONFIG_RT_CONSOLEBUF_SIZE=256
+CONFIG_RT_CONSOLE_DEVICE_NAME="uart2"
+CONFIG_RT_VER_NUM=0x40000
+CONFIG_ARCH_ARM=y
+CONFIG_ARCH_ARM_CORTEX_M=y
+CONFIG_ARCH_ARM_CORTEX_M0=y
+# CONFIG_ARCH_CPU_STACK_GROWS_UPWARD is not set
+
+#
+# RT-Thread Components
+#
+CONFIG_RT_USING_COMPONENTS_INIT=y
+CONFIG_RT_USING_USER_MAIN=y
+CONFIG_RT_MAIN_THREAD_STACK_SIZE=2048
+CONFIG_RT_MAIN_THREAD_PRIORITY=10
+
+#
+# C++ features
+#
+# CONFIG_RT_USING_CPLUSPLUS is not set
+
+#
+# Command shell
+#
+CONFIG_RT_USING_FINSH=y
+CONFIG_FINSH_THREAD_NAME="tshell"
+CONFIG_FINSH_USING_HISTORY=y
+CONFIG_FINSH_HISTORY_LINES=5
+CONFIG_FINSH_USING_SYMTAB=y
+CONFIG_FINSH_USING_DESCRIPTION=y
+# CONFIG_FINSH_ECHO_DISABLE_DEFAULT is not set
+CONFIG_FINSH_THREAD_PRIORITY=20
+CONFIG_FINSH_THREAD_STACK_SIZE=1024
+CONFIG_FINSH_CMD_SIZE=80
+# CONFIG_FINSH_USING_AUTH is not set
+CONFIG_FINSH_USING_MSH=y
+CONFIG_FINSH_USING_MSH_DEFAULT=y
+CONFIG_FINSH_USING_MSH_ONLY=y
+CONFIG_FINSH_ARG_MAX=10
+
+#
+# Device virtual file system
+#
+# CONFIG_RT_USING_DFS is not set
+
+#
+# Device Drivers
+#
+CONFIG_RT_USING_DEVICE_IPC=y
+CONFIG_RT_PIPE_BUFSZ=512
+CONFIG_RT_USING_SERIAL=y
+CONFIG_RT_SERIAL_USING_DMA=y
+# CONFIG_RT_USING_CAN is not set
+# CONFIG_RT_USING_HWTIMER is not set
+# CONFIG_RT_USING_CPUTIME is not set
+# CONFIG_RT_USING_I2C is not set
+CONFIG_RT_USING_PIN=y
+# CONFIG_RT_USING_ADC is not set
+# CONFIG_RT_USING_PWM is not set
+# CONFIG_RT_USING_MTD_NOR is not set
+# CONFIG_RT_USING_MTD_NAND is not set
+# CONFIG_RT_USING_MTD is not set
+# CONFIG_RT_USING_PM is not set
+# CONFIG_RT_USING_RTC is not set
+# CONFIG_RT_USING_SDIO is not set
+# CONFIG_RT_USING_SPI is not set
+# CONFIG_RT_USING_WDT is not set
+# CONFIG_RT_USING_AUDIO is not set
+
+#
+# Using WiFi
+#
+# CONFIG_RT_USING_WIFI is not set
+
+#
+# Using USB
+#
+# CONFIG_RT_USING_USB_HOST is not set
+# CONFIG_RT_USING_USB_DEVICE is not set
+
+#
+# POSIX layer and C standard library
+#
+# CONFIG_RT_USING_LIBC is not set
+# CONFIG_RT_USING_PTHREADS is not set
+
+#
+# Network
+#
+
+#
+# Socket abstraction layer
+#
+# CONFIG_RT_USING_SAL is not set
+
+#
+# light weight TCP/IP stack
+#
+# CONFIG_RT_USING_LWIP is not set
+
+#
+# Modbus master and slave stack
+#
+# CONFIG_RT_USING_MODBUS is not set
+
+#
+# AT commands
+#
+# CONFIG_RT_USING_AT is not set
+
+#
+# VBUS(Virtual Software BUS)
+#
+# CONFIG_RT_USING_VBUS is not set
+
+#
+# Utilities
+#
+# CONFIG_RT_USING_LOGTRACE is not set
+# CONFIG_RT_USING_RYM is not set
+# CONFIG_RT_USING_ULOG is not set
+# CONFIG_RT_USING_UTEST is not set
+
+#
+# ARM CMSIS
+#
+# CONFIG_RT_USING_CMSIS_OS is not set
+# CONFIG_RT_USING_RTT_CMSIS is not set
+# CONFIG_RT_USING_LWP is not set
+
+#
+# RT-Thread online packages
+#
+
+#
+# IoT - internet of things
+#
+# CONFIG_PKG_USING_PAHOMQTT is not set
+# CONFIG_PKG_USING_WEBCLIENT is not set
+# CONFIG_PKG_USING_MONGOOSE is not set
+# CONFIG_PKG_USING_WEBTERMINAL is not set
+# CONFIG_PKG_USING_CJSON is not set
+# CONFIG_PKG_USING_JSMN is not set
+# CONFIG_PKG_USING_LJSON is not set
+# CONFIG_PKG_USING_EZXML is not set
+# CONFIG_PKG_USING_NANOPB is not set
+
+#
+# Wi-Fi
+#
+
+#
+# Marvell WiFi
+#
+# CONFIG_PKG_USING_WLANMARVELL is not set
+
+#
+# Wiced WiFi
+#
+# CONFIG_PKG_USING_WLAN_WICED is not set
+# CONFIG_PKG_USING_COAP is not set
+# CONFIG_PKG_USING_NOPOLL is not set
+# CONFIG_PKG_USING_NETUTILS is not set
+# CONFIG_PKG_USING_AT_DEVICE is not set
+
+#
+# IoT Cloud
+#
+# CONFIG_PKG_USING_ONENET is not set
+# CONFIG_PKG_USING_GAGENT_CLOUD is not set
+# CONFIG_PKG_USING_ALI_IOTKIT is not set
+# CONFIG_PKG_USING_AZURE is not set
+
+#
+# security packages
+#
+# CONFIG_PKG_USING_MBEDTLS is not set
+# CONFIG_PKG_USING_libsodium is not set
+# CONFIG_PKG_USING_TINYCRYPT is not set
+
+#
+# language packages
+#
+# CONFIG_PKG_USING_LUA is not set
+# CONFIG_PKG_USING_JERRYSCRIPT is not set
+# CONFIG_PKG_USING_MICROPYTHON is not set
+
+#
+# multimedia packages
+#
+# CONFIG_PKG_USING_OPENMV is not set
+# CONFIG_PKG_USING_MUPDF is not set
+
+#
+# tools packages
+#
+# CONFIG_PKG_USING_CMBACKTRACE is not set
+# CONFIG_PKG_USING_EASYFLASH is not set
+# CONFIG_PKG_USING_EASYLOGGER is not set
+# CONFIG_PKG_USING_SYSTEMVIEW is not set
+
+#
+# system packages
+#
+# CONFIG_PKG_USING_GUIENGINE is not set
+# CONFIG_PKG_USING_CAIRO is not set
+# CONFIG_PKG_USING_PIXMAN is not set
+# CONFIG_PKG_USING_LWEXT4 is not set
+# CONFIG_PKG_USING_PARTITION is not set
+# CONFIG_PKG_USING_FAL is not set
+# CONFIG_PKG_USING_SQLITE is not set
+# CONFIG_PKG_USING_RTI is not set
+# CONFIG_PKG_USING_LITTLEVGL2RTT is not set
+
+#
+# peripheral libraries and drivers
+#
+# CONFIG_PKG_USING_STM32F4_HAL is not set
+# CONFIG_PKG_USING_STM32F4_DRIVERS is not set
+# CONFIG_PKG_USING_REALTEK_AMEBA is not set
+# CONFIG_PKG_USING_SHT2X is not set
+# CONFIG_PKG_USING_AHT10 is not set
+# CONFIG_PKG_USING_AP3216C is not set
+# CONFIG_PKG_USING_STM32_SDIO is not set
+
+#
+# miscellaneous packages
+#
+# CONFIG_PKG_USING_LIBCSV is not set
+# CONFIG_PKG_USING_OPTPARSE is not set
+# CONFIG_PKG_USING_FASTLZ is not set
+# CONFIG_PKG_USING_MINILZO is not set
+# CONFIG_PKG_USING_QUICKLZ is not set
+# CONFIG_PKG_USING_MULTIBUTTON is not set
+# CONFIG_PKG_USING_CANFESTIVAL is not set
+# CONFIG_PKG_USING_ZLIB is not set
+# CONFIG_PKG_USING_DSTR is not set
+
+#
+# sample package
+#
+
+#
+# samples: kernel and components samples
+#
+# CONFIG_PKG_USING_KERNEL_SAMPLES is not set
+# CONFIG_PKG_USING_FILESYSTEM_SAMPLES is not set
+# CONFIG_PKG_USING_NETWORK_SAMPLES is not set
+# CONFIG_PKG_USING_PERIPHERAL_SAMPLES is not set
+
+#
+# example package: hello
+#
+# CONFIG_PKG_USING_HELLO is not set
+CONFIG_SOC_FAMILY_STM32=y
+CONFIG_SOC_SERIES_STM32L0=y
+
+#
+# Hardware Drivers Config
+#
+CONFIG_SOC_STM32L053R8=y
+
+#
+# Onboard Peripheral Drivers
+#
+CONFIG_BSP_USING_USB_TO_USART=y
+
+#
+# On-chip Peripheral Drivers
+#
+CONFIG_BSP_USING_GPIO=y
+CONFIG_BSP_USING_UART=y
+CONFIG_BSP_USING_UART2=y
+# CONFIG_BSP_UART2_RX_USING_DMA is not set
+
+#
+# Board extended module Drivers
+#

bsp/stm32/stm32l053-st-nucleo/.gitignore

+*.pyc
+*.map
+*.dblite
+*.elf
+*.bin
+*.hex
+*.axf
+*.exe
+*.pdb
+*.idb
+*.ilk
+*.old
+build
+Debug
+documentation/html
+packages/
+*~
+*.o
+*.obj
+*.out
+*.bak
+*.dep
+*.lib
+*.i
+*.d
+.DS_Stor*
+.config 3
+.config 4
+.config 5
+Midea-X1
+*.uimg
+GPATH
+GRTAGS
+GTAGS
+.vscode
+JLinkLog.txt
+JLinkSettings.ini
+DebugConfig/
+RTE/
+settings/
+*.uvguix*
+cconfig.h

bsp/stm32/stm32l053-st-nucleo/Kconfig

+mainmenu "RT-Thread Configuration"
+
+config $BSP_DIR
+    string
+    option env="BSP_ROOT"
+    default "."
+
+config $RTT_DIR
+    string
+    option env="RTT_ROOT"
+    default "../../.."
+
+config $PKGS_DIR
+    string
+    option env="PKGS_ROOT"
+    default "packages"
+
+source "$RTT_DIR/Kconfig"
+source "$PKGS_DIR/Kconfig"
+source "../libraries/Kconfig"
+source "board/Kconfig"

bsp/stm32/stm32l053-st-nucleo/README.md

+# NUCLEO-L053R8 开发板的 BSP 说明
+
+## 简介
+
+本文档为ST官方 NUCLEO-L053R8 开发板的 BSP (板级支持包) 说明。
+
+主要内容如下：
+
+- 开发板资源介绍
+- BSP 快速上手
+- 进阶使用方法
+
+通过阅读快速上手章节开发者可以快速地上手该 BSP，将 RT-Thread 运行在开发板上。在进阶使用指南章节，将会介绍更多高级功能，帮助开发者利用 RT-Thread 驱动更多板载资源。
+
+## 开发板介绍
+
+NUCLEO-L053R8 开发板是 ST 官方推出的一款基于 ARM Cortex-M0+ 内核的开发板，绿色的 Nucleo 标志显示了这款芯片是低功耗系列，板载 ST-LINK/V2-1 调试器/编程器，该开发板具有丰富的扩展接口，且与Arduino™ nano 接口兼容，可以方便验证 STM32L053R8 芯片的性能。
+
+开发板外观如下图所示：
+
+![board](figures/board.jpg)
+
+该开发板常用 **板载资源** 如下：
+
+- MCU：STM32L053R8，主频 32MHz，64KB FLASH ，8KB RAM
+- 常用外设
+  - LED：3个，USB communication(LD1 双色),power LED(LD3 红色),user LED(LD2 黄色)
+  - 按键：1个，B1（兼具唤醒功能，PC13），B2（RESET）
+- 常用接口：USB 支持 3 种不同接口：虚拟 COM 端口、大容量存储和调试端口；arduino 接口等
+- 调试接口：标准 SWD
+
+开发板更多详细信息请参考【STMicroelectronics】 [NUCLEO-L053R8](https://www.st.com/en/evaluation-tools/nucleo-l053r8.html)。
+
+## 外设支持
+
+本 BSP 目前对外设的支持情况如下：
+
+| **板载外设**      | **支持情况** | **备注**                              |
+| :----------------- | :----------: | :------------------------------------- |
+| 板载 ST-LINK 转串口        |     支持     |                             |
+| **片上外设**      | **支持情况** | **备注**                              |
+| GPIO              |     支持     | PA0, PA1... PC15 ---> PIN: 0, 1...47 |
+| UART              |     支持     | UART2                             |
+| SPI               |   暂不支持   | SPI1 即将支持                            |
+| I2C               |   暂不支持   | 软件 I2C 即将支持                      |
+| RTC               |   暂不支持   | 即将支持                              |
+| PWM               |   暂不支持   | 即将支持                              |
+| USB Device        |   暂不支持   | 即将支持                             |
+| IWG               |   暂不支持   | 即将支持                               |
+| **扩展模块**      | **支持情况** | **备注**                                                                  |
+
+## 使用说明
+
+使用说明分为如下两个章节：
+
+- 快速上手
+
+    本章节是为刚接触 RT-Thread 的新手准备的使用说明，遵循简单的步骤即可将 RT-Thread 操作系统运行在该开发板上，看到实验效果 。
+
+- 进阶使用
+
+    本章节是为需要在 RT-Thread 操作系统上使用更多开发板资源的开发者准备的。通过使用 ENV 工具对 BSP 进行配置，可以开启更多板载资源，实现更多高级功能。
+
+
+### 快速上手
+
+本 BSP 为开发者提供 MDK5 和 IAR 工程，并且支持 GCC 开发环境。下面以 MDK5 开发环境为例，介绍如何将系统运行起来。
+
+#### 硬件连接
+
+使用数据线连接开发板到 PC，打开电源开关。
+
+#### 编译下载
+
+双击 project.uvprojx 文件，打开 MDK5 工程，编译并下载程序到开发板。
+
+> 工程默认配置使用 ST-LINK 仿真器下载程序，在通过 microUSB 连接开发板的基础上，点击下载按钮即可下载程序到开发板
+
+#### 运行结果
+
+下载程序成功之后，系统会自动运行，观察开发板上 LED 的运行效果，红色 LD1 和 LD3 常亮、黄色 LD2 会周期性闪烁。
+
+USB 虚拟 COM 端口默认连接串口 2，在终端工具里打开相应的串口（115200-8-1-N），复位设备后，可以看到 RT-Thread 的输出信息:
+
+```bash
+ \ | /
+- RT -     Thread Operating System
+ / | \     4.0.0 build Jan  9 2019
+ 2006 - 2018 Copyright by rt-thread team
+msh >
+```
+### 进阶使用
+
+此 BSP 默认只开启了 GPIO 和 串口1 的功能，如果需使用 SD 卡、Flash 等更多高级功能，需要利用 ENV 工具对BSP 进行配置，步骤如下：
+
+1. 在 bsp 下打开 env 工具。
+
+2. 输入`menuconfig`命令配置工程，配置好之后保存退出。
+
+3. 输入`pkgs --update`命令更新软件包。
+
+4. 输入`scons --target=mdk5/iar` 命令重新生成工程。
+
+本章节更多详细的介绍请参考 [STM32 系列 BSP 外设驱动使用教程](../docs/STM32系列BSP外设驱动使用教程.md)。
+
+## 注意事项
+
+- 开机时如果不能打印 RT-Thread 版本信息，请将BSP中串口 GPIO 速率调低
+- 开机时如果不能打印 RT-Thread 版本信息，请重新选择 PC 端串口调试软件的串口号
+
+## 联系人信息
+
+维护人:
+
+-  [sun_shine](https://github.com/sunshine0824), 邮箱：<baozitai@163.com>
\ No newline at end of file

bsp/stm32/stm32l053-st-nucleo/SConscript

+# for module compiling
+import os
+Import('RTT_ROOT')
+
+cwd = str(Dir('#'))
+objs = []
+list = os.listdir(cwd)
+
+for d in list:
+    path = os.path.join(cwd, d)
+    if os.path.isfile(os.path.join(path, 'SConscript')):
+        objs = objs + SConscript(os.path.join(d, 'SConscript'))
+
+Return('objs')

bsp/stm32/stm32l053-st-nucleo/SConstruct

+import os
+import sys
+import rtconfig
+
+if os.getenv('RTT_ROOT'):
+    RTT_ROOT = os.getenv('RTT_ROOT')
+else:
+    RTT_ROOT = os.path.normpath(os.getcwd() + '/../../..')
+
+sys.path = sys.path + [os.path.join(RTT_ROOT, 'tools')]
+try:
+    from building import *
+except:
+    print('Cannot found RT-Thread root directory, please check RTT_ROOT')
+    print(RTT_ROOT)
+    exit(-1)
+
+TARGET = 'rt-thread.' + rtconfig.TARGET_EXT
+
+env = Environment(tools = ['mingw'],
+    AS = rtconfig.AS, ASFLAGS = rtconfig.AFLAGS,
+    CC = rtconfig.CC, CCFLAGS = rtconfig.CFLAGS,
+    AR = rtconfig.AR, ARFLAGS = '-rc',
+    LINK = rtconfig.LINK, LINKFLAGS = rtconfig.LFLAGS)
+env.PrependENVPath('PATH', rtconfig.EXEC_PATH)
+
+if rtconfig.PLATFORM == 'iar':
+    env.Replace(CCCOM = ['$CC $CCFLAGS $CPPFLAGS $_CPPDEFFLAGS $_CPPINCFLAGS -o $TARGET $SOURCES'])
+    env.Replace(ARFLAGS = [''])
+    env.Replace(LINKCOM = env["LINKCOM"] + ' --map rt-thread.map')
+
+Export('RTT_ROOT')
+Export('rtconfig')
+
+SDK_ROOT = os.path.abspath('./')
+
+if os.path.exists(SDK_ROOT + '/libraries'):
+    libraries_path_prefix = SDK_ROOT + '/libraries'
+else:
+    libraries_path_prefix = os.path.dirname(SDK_ROOT) + '/libraries'
+
+SDK_LIB = libraries_path_prefix
+Export('SDK_LIB')
+
+# prepare building environment
+objs = PrepareBuilding(env, RTT_ROOT, has_libcpu=False)
+
+stm32_library = 'STM32L0xx_HAL'
+rtconfig.BSP_LIBRARY_TYPE = stm32_library
+
+# include libraries
+objs.extend(SConscript(os.path.join(libraries_path_prefix, stm32_library, 'SConscript')))
+
+# include drivers
+objs.extend(SConscript(os.path.join(libraries_path_prefix, 'HAL_Drivers', 'SConscript')))
+
+# make a building
+DoBuilding(TARGET, objs)

bsp/stm32/stm32l053-st-nucleo/applications/SConscript

+Import('RTT_ROOT')
+Import('rtconfig')
+from building import *
+
+cwd     = os.path.join(str(Dir('#')), 'applications')
+src	= Glob('*.c')
+CPPPATH = [cwd, str(Dir('#'))]
+
+group = DefineGroup('Applications', src, depend = [''], CPPPATH = CPPPATH)
+
+Return('group')

bsp/stm32/stm32l053-st-nucleo/applications/main.c

+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2018-11-06     SummerGift   change to new framework
+ */
+
+#include <rtthread.h>
+#include <rtdevice.h>
+#include <board.h>
+
+/* defined the LED pin: PA5 */
+#define LED0_PIN     GET_PIN(A, 5)
+
+int main(void)
+{
+    int count = 1;
+    /* set LED0 pin mode to output */
+    rt_pin_mode(LED0_PIN, PIN_MODE_OUTPUT);
+
+    while (count++)
+    {
+        rt_pin_write(LED0_PIN, PIN_HIGH);
+        rt_thread_mdelay(500);
+        rt_pin_write(LED0_PIN, PIN_LOW);
+        rt_thread_mdelay(500);
+    }
+
+    return RT_EOK;
+}

bsp/stm32/stm32l053-st-nucleo/board/CubeMX_Config/.mxproject

+[PreviousGenFiles]
+HeaderPath=D:/rtt/rt-thread/bsp/stm32/stm32l053-st-nucleo/board/CubeMX_Config/Inc
+HeaderFiles=stm32l0xx_it.h;stm32l0xx_hal_conf.h;main.h;
+SourcePath=D:/rtt/rt-thread/bsp/stm32/stm32l053-st-nucleo/board/CubeMX_Config/Src
+SourceFiles=stm32l0xx_it.c;stm32l0xx_hal_msp.c;main.c;
+
+[PreviousLibFiles]
+LibFiles=Drivers/STM32L0xx_HAL_Driver/Inc/stm32l0xx_hal_tim.h;Drivers/STM32L0xx_HAL_Driver/Inc/stm32l0xx_hal_tim_ex.h;Drivers/STM32L0xx_HAL_Driver/Inc/stm32l0xx_hal_uart.h;Drivers/STM32L0xx_HAL_Driver/Inc/stm32l0xx_hal_uart_ex.h;Drivers/STM32L0xx_HAL_Driver/Inc/stm32l0xx_hal.h;Drivers/STM32L0xx_HAL_Driver/Inc/stm32l0xx_hal_def.h;Drivers/STM32L0xx_HAL_Driver/Inc/Legacy/stm32_hal_legacy.h;Drivers/STM32L0xx_HAL_Driver/Inc/stm32l0xx_hal_i2c.h;Drivers/STM32L0xx_HAL_Driver/Inc/stm32l0xx_hal_i2c_ex.h;Drivers/STM32L0xx_HAL_Driver/Inc/stm32l0xx_hal_rcc.h;Drivers/STM32L0xx_HAL_Driver/Inc/stm32l0xx_hal_rcc_ex.h;Drivers/STM32L0xx_HAL_Driver/Inc/stm32l0xx_hal_flash_ramfunc.h;Drivers/STM32L0xx_HAL_Driver/Inc/stm32l0xx_hal_flash.h;Drivers/STM32L0xx_HAL_Driver/Inc/stm32l0xx_hal_flash_ex.h;Drivers/STM32L0xx_HAL_Driver/Inc/stm32l0xx_hal_gpio.h;Drivers/STM32L0xx_HAL_Driver/Inc/stm32l0xx_hal_gpio_ex.h;Drivers/STM32L0xx_HAL_Driver/Inc/stm32l0xx_hal_dma.h;Drivers/STM32L0xx_HAL_Driver/Inc/stm32l0xx_hal_dma_ex.h;Drivers/STM32L0xx_HAL_Driver/Inc/stm32l0xx_hal_pwr.h;Drivers/STM32L0xx_HAL_Driver/Inc/stm32l0xx_hal_pwr_ex.h;Drivers/STM32L0xx_HAL_Driver/Inc/stm32l0xx_hal_cortex.h;Drivers/STM32L0xx_HAL_Driver/Src/stm32l0xx_hal_tim.c;Drivers/STM32L0xx_HAL_Driver/Src/stm32l0xx_hal_tim_ex.c;Drivers/STM32L0xx_HAL_Driver/Src/stm32l0xx_hal_uart.c;Drivers/STM32L0xx_HAL_Driver/Src/stm32l0xx_hal_uart_ex.c;Drivers/STM32L0xx_HAL_Driver/Src/stm32l0xx_hal.c;Drivers/STM32L0xx_HAL_Driver/Src/stm32l0xx_hal_i2c.c;Drivers/STM32L0xx_HAL_Driver/Src/stm32l0xx_hal_i2c_ex.c;Drivers/STM32L0xx_HAL_Driver/Src/stm32l0xx_hal_rcc.c;Drivers/STM32L0xx_HAL_Driver/Src/stm32l0xx_hal_rcc_ex.c;Drivers/STM32L0xx_HAL_Driver/Src/stm32l0xx_hal_flash_ramfunc.c;Drivers/STM32L0xx_HAL_Driver/Src/stm32l0xx_hal_flash.c;Drivers/STM32L0xx_HAL_Driver/Src/stm32l0xx_hal_flash_ex.c;Drivers/STM32L0xx_HAL_Driver/Src/stm32l0xx_hal_gpio.c;Drivers/STM32L0xx_HAL_Driver/Src/stm32l0xx_hal_dma.c;Drivers/STM32L0xx_HAL_Driver/Src/stm32l0xx_hal_pwr.c;Drivers/STM32L0xx_HAL_Driver/Src/stm32l0xx_hal_pwr_ex.c;Drivers/STM32L0xx_HAL_Driver/Src/stm32l0xx_hal_cortex.c;Drivers/CMSIS/Device/ST/STM32L0xx/Include/stm32l053xx.h;Drivers/CMSIS/Device/ST/STM32L0xx/Include/stm32l0xx.h;Drivers/CMSIS/Device/ST/STM32L0xx/Include/system_stm32l0xx.h;Drivers/CMSIS/Device/ST/STM32L0xx/Source/Templates/system_stm32l0xx.c;Drivers/CMSIS/Include/arm_common_tables.h;Drivers/CMSIS/Include/arm_const_structs.h;Drivers/CMSIS/Include/arm_math.h;Drivers/CMSIS/Include/cmsis_armcc.h;Drivers/CMSIS/Include/cmsis_armcc_V6.h;Drivers/CMSIS/Include/cmsis_gcc.h;Drivers/CMSIS/Include/core_cm0.h;Drivers/CMSIS/Include/core_cm0plus.h;Drivers/CMSIS/Include/core_cm3.h;Drivers/CMSIS/Include/core_cm4.h;Drivers/CMSIS/Include/core_cm7.h;Drivers/CMSIS/Include/core_cmFunc.h;Drivers/CMSIS/Include/core_cmInstr.h;Drivers/CMSIS/Include/core_cmSimd.h;Drivers/CMSIS/Include/core_sc000.h;Drivers/CMSIS/Include/core_sc300.h;
+
+[PreviousUsedKeilFiles]
+SourceFiles=..\Src\main.c;..\Src\stm32l0xx_it.c;..\Src\stm32l0xx_hal_msp.c;../Drivers/STM32L0xx_HAL_Driver/Src/stm32l0xx_hal_tim.c;../Drivers/STM32L0xx_HAL_Driver/Src/stm32l0xx_hal_tim_ex.c;../Drivers/STM32L0xx_HAL_Driver/Src/stm32l0xx_hal_uart.c;../Drivers/STM32L0xx_HAL_Driver/Src/stm32l0xx_hal_uart_ex.c;../Drivers/STM32L0xx_HAL_Driver/Src/stm32l0xx_hal.c;../Drivers/STM32L0xx_HAL_Driver/Src/stm32l0xx_hal_i2c.c;../Drivers/STM32L0xx_HAL_Driver/Src/stm32l0xx_hal_i2c_ex.c;../Drivers/STM32L0xx_HAL_Driver/Src/stm32l0xx_hal_rcc.c;../Drivers/STM32L0xx_HAL_Driver/Src/stm32l0xx_hal_rcc_ex.c;../Drivers/STM32L0xx_HAL_Driver/Src/stm32l0xx_hal_flash_ramfunc.c;../Drivers/STM32L0xx_HAL_Driver/Src/stm32l0xx_hal_flash.c;../Drivers/STM32L0xx_HAL_Driver/Src/stm32l0xx_hal_flash_ex.c;../Drivers/STM32L0xx_HAL_Driver/Src/stm32l0xx_hal_gpio.c;../Drivers/STM32L0xx_HAL_Driver/Src/stm32l0xx_hal_dma.c;../Drivers/STM32L0xx_HAL_Driver/Src/stm32l0xx_hal_pwr.c;../Drivers/STM32L0xx_HAL_Driver/Src/stm32l0xx_hal_pwr_ex.c;../Drivers/STM32L0xx_HAL_Driver/Src/stm32l0xx_hal_cortex.c;../\Src/system_stm32l0xx.c;../Drivers/CMSIS/Device/ST/STM32L0xx/Source/Templates/system_stm32l0xx.c;null;
+HeaderPath=..\Drivers\STM32L0xx_HAL_Driver\Inc;..\Drivers\STM32L0xx_HAL_Driver\Inc\Legacy;..\Drivers\CMSIS\Device\ST\STM32L0xx\Include;..\Drivers\CMSIS\Include;..\Inc;
+

bsp/stm32/stm32l053-st-nucleo/board/CubeMX_Config/CubeMX_Config.ioc

+#MicroXplorer Configuration settings - do not modify
+File.Version=6
+KeepUserPlacement=true
+Mcu.Family=STM32L0
+Mcu.IP0=NVIC
+Mcu.IP1=RCC
+Mcu.IP2=SYS
+Mcu.IP3=USART2
+Mcu.IPNb=4
+Mcu.Name=STM32L053R(6-8)Tx
+Mcu.Package=LQFP64
+Mcu.Pin0=PC13
+Mcu.Pin1=PC14-OSC32_IN
+Mcu.Pin10=VP_SYS_VS_Systick
+Mcu.Pin2=PC15-OSC32_OUT
+Mcu.Pin3=PH0-OSC_IN
+Mcu.Pin4=PH1-OSC_OUT
+Mcu.Pin5=PA2
+Mcu.Pin6=PA3
+Mcu.Pin7=PA5
+Mcu.Pin8=PA13
+Mcu.Pin9=PA14
+Mcu.PinsNb=11
+Mcu.ThirdPartyNb=0
+Mcu.UserConstants=
+Mcu.UserName=STM32L053R8Tx
+MxCube.Version=4.27.0
+MxDb.Version=DB.4.0.270
+NVIC.HardFault_IRQn=true\:0\:0\:false\:false\:true\:false
+NVIC.NonMaskableInt_IRQn=true\:0\:0\:false\:false\:true\:false
+NVIC.PendSV_IRQn=true\:0\:0\:false\:false\:true\:false
+NVIC.SVC_IRQn=true\:0\:0\:false\:false\:true\:false
+NVIC.SysTick_IRQn=true\:0\:0\:true\:false\:true\:true
+NVIC.USART2_IRQn=true\:0\:0\:false\:false\:true\:true
+PA13.GPIOParameters=GPIO_Label
+PA13.GPIO_Label=TMS
+PA13.Locked=true
+PA13.Mode=Serial_Wire
+PA13.Signal=SYS_SWDIO
+PA14.GPIOParameters=GPIO_Label
+PA14.GPIO_Label=TCK
+PA14.Locked=true
+PA14.Mode=Serial_Wire
+PA14.Signal=SYS_SWCLK
+PA2.GPIOParameters=GPIO_Label
+PA2.GPIO_Label=USART_TX
+PA2.Locked=true
+PA2.Mode=Asynchronous
+PA2.Signal=USART2_TX
+PA3.GPIOParameters=GPIO_Label
+PA3.GPIO_Label=USART_RX
+PA3.Locked=true
+PA3.Mode=Asynchronous
+PA3.Signal=USART2_RX
+PA5.GPIOParameters=GPIO_Label
+PA5.GPIO_Label=LD2 [Green Led]
+PA5.Locked=true
+PA5.Signal=GPIO_Output
+PC13.GPIOParameters=GPIO_Label,GPIO_ModeDefaultEXTI
+PC13.GPIO_Label=B1 [Blue PushButton]
+PC13.GPIO_ModeDefaultEXTI=GPIO_MODE_IT_FALLING
+PC13.Locked=true
+PC13.Signal=GPXTI13
+PC14-OSC32_IN.Locked=true
+PC14-OSC32_IN.Mode=LSE-External-Oscillator
+PC14-OSC32_IN.Signal=RCC_OSC32_IN
+PC15-OSC32_OUT.Locked=true
+PC15-OSC32_OUT.Mode=LSE-External-Oscillator
+PC15-OSC32_OUT.Signal=RCC_OSC32_OUT
+PCC.Checker=true
+PCC.Line=STM32L0x3
+PCC.MCU=STM32L053R(6-8)Tx
+PCC.PartNumber=STM32L053R8Tx
+PCC.Seq0=0
+PCC.Series=STM32L0
+PCC.Temperature=25
+PCC.Vdd=null
+PH0-OSC_IN.Locked=true
+PH0-OSC_IN.Mode=HSE-External-Oscillator
+PH0-OSC_IN.Signal=RCC_OSC_IN
+PH1-OSC_OUT.Locked=true
+PH1-OSC_OUT.Mode=HSE-External-Oscillator
+PH1-OSC_OUT.Signal=RCC_OSC_OUT
+PinOutPanel.RotationAngle=0
+ProjectManager.AskForMigrate=true
+ProjectManager.BackupPrevious=false
+ProjectManager.CompilerOptimize=6
+ProjectManager.ComputerToolchain=false
+ProjectManager.CoupleFile=false
+ProjectManager.CustomerFirmwarePackage=
+ProjectManager.DefaultFWLocation=true
+ProjectManager.DeletePrevious=true
+ProjectManager.DeviceId=STM32L053R8Tx
+ProjectManager.FirmwarePackage=STM32Cube FW_L0 V1.10.0
+ProjectManager.FreePins=false
+ProjectManager.HalAssertFull=false
+ProjectManager.HeapSize=0x200
+ProjectManager.KeepUserCode=true
+ProjectManager.LastFirmware=true
+ProjectManager.LibraryCopy=0
+ProjectManager.MainLocation=Src
+ProjectManager.NoMain=false
+ProjectManager.PreviousToolchain=
+ProjectManager.ProjectBuild=false
+ProjectManager.ProjectFileName=CubeMX_Config.ioc
+ProjectManager.ProjectName=CubeMX_Config
+ProjectManager.StackSize=0x400
+ProjectManager.TargetToolchain=MDK-ARM V5
+ProjectManager.ToolChainLocation=
+ProjectManager.UnderRoot=false
+ProjectManager.functionlistsort=1-MX_GPIO_Init-GPIO-false-HAL-true,2-SystemClock_Config-RCC-false-HAL-false,3-MX_USART2_UART_Init-USART2-false-HAL-true
+RCC.48CLKFreq_Value=32000000
+RCC.48RNGFreq_Value=32000000
+RCC.48USBFreq_Value=32000000
+RCC.AHBFreq_Value=32000000
+RCC.APB1Freq_Value=32000000
+RCC.APB1TimFreq_Value=32000000
+RCC.APB2Freq_Value=32000000
+RCC.APB2TimFreq_Value=32000000
+RCC.FCLKCortexFreq_Value=32000000
+RCC.FamilyName=M
+RCC.HCLKFreq_Value=32000000
+RCC.HSE_VALUE=8000000
+RCC.HSI16_VALUE=16000000
+RCC.HSI48_VALUE=48000000
+RCC.HSI_VALUE=16000000
+RCC.I2C1Freq_Value=32000000
+RCC.IPParameters=48CLKFreq_Value,48RNGFreq_Value,48USBFreq_Value,AHBFreq_Value,APB1Freq_Value,APB1TimFreq_Value,APB2Freq_Value,APB2TimFreq_Value,FCLKCortexFreq_Value,FamilyName,HCLKFreq_Value,HSE_VALUE,HSI16_VALUE,HSI48_VALUE,HSI_VALUE,I2C1Freq_Value,LCDFreq_Value,LPTIMFreq_Value,LPUARTFreq_Value,LSI_VALUE,MCOPinFreq_Value,MSIClockRange,MSI_VALUE,PLLCLKFreq_Value,PLLMUL,PWRFreq_Value,RTCFreq_Value,RTCHSEDivFreq_Value,SYSCLKFreq_VALUE,SYSCLKSource,TIMFreq_Value,TimerFreq_Value,USART1Freq_Value,USART2Freq_Value,VCOInputFreq_Value,VCOOutputFreq_Value,WatchDogFreq_Value
+RCC.LCDFreq_Value=37000
+RCC.LPTIMFreq_Value=32000000
+RCC.LPUARTFreq_Value=32000000
+RCC.LSI_VALUE=37000
+RCC.MCOPinFreq_Value=32000000
+RCC.MSIClockRange=RCC_MSIRANGE_6
+RCC.MSI_VALUE=4194000
+RCC.PLLCLKFreq_Value=32000000
+RCC.PLLMUL=RCC_PLLMUL_4
+RCC.PWRFreq_Value=32000000
+RCC.RTCFreq_Value=37000
+RCC.RTCHSEDivFreq_Value=4000000
+RCC.SYSCLKFreq_VALUE=32000000
+RCC.SYSCLKSource=RCC_SYSCLKSOURCE_PLLCLK
+RCC.TIMFreq_Value=32000000
+RCC.TimerFreq_Value=32000000
+RCC.USART1Freq_Value=32000000
+RCC.USART2Freq_Value=32000000
+RCC.VCOInputFreq_Value=16000000
+RCC.VCOOutputFreq_Value=64000000
+RCC.WatchDogFreq_Value=37000
+SH.GPXTI13.0=GPIO_EXTI13
+SH.GPXTI13.ConfNb=1
+USART2.IPParameters=VirtualMode-Asynchronous
+USART2.VirtualMode-Asynchronous=VM_ASYNC
+VP_SYS_VS_Systick.Mode=SysTick
+VP_SYS_VS_Systick.Signal=SYS_VS_Systick
+board=NUCLEO-L053R8
+boardIOC=true

bsp/stm32/stm32l053-st-nucleo/board/CubeMX_Config/Inc/main.h

+/**
+  ******************************************************************************
+  * @file           : main.h
+  * @brief          : Header for main.c file.
+  *                   This file contains the common defines of the application.
+  ******************************************************************************
+  ** This notice applies to any and all portions of this file
+  * that are not between comment pairs USER CODE BEGIN and
+  * USER CODE END. Other portions of this file, whether 
+  * inserted by the user or by software development tools
+  * are owned by their respective copyright owners.
+  *
+  * COPYRIGHT(c) 2019 STMicroelectronics
+  *
+  * Redistribution and use in source and binary forms, with or without modification,
+  * are permitted provided that the following conditions are met:
+  *   1. Redistributions of source code must retain the above copyright notice,
+  *      this list of conditions and the following disclaimer.
+  *   2. Redistributions in binary form must reproduce the above copyright notice,
+  *      this list of conditions and the following disclaimer in the documentation
+  *      and/or other materials provided with the distribution.
+  *   3. Neither the name of STMicroelectronics nor the names of its contributors
+  *      may be used to endorse or promote products derived from this software
+  *      without specific prior written permission.
+  *
+  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+  *
+  ******************************************************************************
+  */
+
+/* Define to prevent recursive inclusion -------------------------------------*/
+#ifndef __MAIN_H__
+#define __MAIN_H__
+
+/* Includes ------------------------------------------------------------------*/
+
+/* USER CODE BEGIN Includes */
+
+/* USER CODE END Includes */
+
+/* Private define ------------------------------------------------------------*/
+
+#define B1_Pin GPIO_PIN_13
+#define B1_GPIO_Port GPIOC
+#define USART_TX_Pin GPIO_PIN_2
+#define USART_TX_GPIO_Port GPIOA
+#define USART_RX_Pin GPIO_PIN_3
+#define USART_RX_GPIO_Port GPIOA
+#define LD2_Pin GPIO_PIN_5
+#define LD2_GPIO_Port GPIOA
+#define TMS_Pin GPIO_PIN_13
+#define TMS_GPIO_Port GPIOA
+#define TCK_Pin GPIO_PIN_14
+#define TCK_GPIO_Port GPIOA
+
+/* ########################## Assert Selection ############################## */
+/**
+  * @brief Uncomment the line below to expanse the "assert_param" macro in the 
+  *        HAL drivers code
+  */
+/* #define USE_FULL_ASSERT    1U */
+
+/* USER CODE BEGIN Private defines */
+
+/* USER CODE END Private defines */
+
+#ifdef __cplusplus
+ extern "C" {
+#endif
+void _Error_Handler(char *, int);
+
+#define Error_Handler() _Error_Handler(__FILE__, __LINE__)
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __MAIN_H__ */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

bsp/stm32/stm32l053-st-nucleo/board/CubeMX_Config/Inc/stm32l0xx_hal_conf.h

+/**
+  ******************************************************************************
+  * @file    stm32l0xx_hal_conf.h
+  * @brief   HAL configuration file.             
+  ******************************************************************************
+  * @attention
+  *
+  * <h2><center>&copy; COPYRIGHT(c) 2019 STMicroelectronics</center></h2>
+  *
+  * Redistribution and use in source and binary forms, with or without modification,
+  * are permitted provided that the following conditions are met:
+  *   1. Redistributions of source code must retain the above copyright notice,
+  *      this list of conditions and the following disclaimer.
+  *   2. Redistributions in binary form must reproduce the above copyright notice,
+  *      this list of conditions and the following disclaimer in the documentation
+  *      and/or other materials provided with the distribution.
+  *   3. Neither the name of STMicroelectronics nor the names of its contributors
+  *      may be used to endorse or promote products derived from this software
+  *      without specific prior written permission.
+  *
+  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+  *
+  ******************************************************************************
+  */ 
+
+/* Define to prevent recursive inclusion -------------------------------------*/
+#ifndef __STM32L0xx_HAL_CONF_H
+#define __STM32L0xx_HAL_CONF_H
+
+#ifdef __cplusplus
+ extern "C" {
+#endif
+
+#include "main.h"
+/* Exported types ------------------------------------------------------------*/
+/* Exported constants --------------------------------------------------------*/
+
+/* ########################## Module Selection ############################## */
+/**
+  * @brief This is the list of modules to be used in the HAL driver 
+  */
+
+#define HAL_MODULE_ENABLED  
+/*#define HAL_ADC_MODULE_ENABLED   */
+/*#define HAL_CRYP_MODULE_ENABLED   */
+/*#define HAL_COMP_MODULE_ENABLED   */
+/*#define HAL_CRC_MODULE_ENABLED   */
+/*#define HAL_CRYP_MODULE_ENABLED   */
+/*#define HAL_DAC_MODULE_ENABLED   */
+/*#define HAL_FIREWALL_MODULE_ENABLED   */
+/*#define HAL_I2S_MODULE_ENABLED   */
+/*#define HAL_IWDG_MODULE_ENABLED   */
+/*#define HAL_LCD_MODULE_ENABLED   */
+/*#define HAL_LPTIM_MODULE_ENABLED   */
+/*#define HAL_RNG_MODULE_ENABLED   */
+/*#define HAL_RTC_MODULE_ENABLED   */
+/*#define HAL_SPI_MODULE_ENABLED   */
+/*#define HAL_TIM_MODULE_ENABLED   */
+/*#define HAL_TSC_MODULE_ENABLED   */
+#define HAL_UART_MODULE_ENABLED
+/*#define HAL_USART_MODULE_ENABLED   */
+/*#define HAL_IRDA_MODULE_ENABLED   */
+/*#define HAL_SMARTCARD_MODULE_ENABLED   */
+/*#define HAL_SMBUS_MODULE_ENABLED   */
+/*#define HAL_WWDG_MODULE_ENABLED   */
+/*#define HAL_PCD_MODULE_ENABLED   */
+/*#define HAL_EXTI_MODULE_ENABLED   */
+#define HAL_GPIO_MODULE_ENABLED
+#define HAL_DMA_MODULE_ENABLED
+#define HAL_I2C_MODULE_ENABLED
+#define HAL_RCC_MODULE_ENABLED
+#define HAL_FLASH_MODULE_ENABLED
+#define HAL_PWR_MODULE_ENABLED
+#define HAL_CORTEX_MODULE_ENABLED
+
+/* ########################## Oscillator Values adaptation ####################*/
+/**
+  * @brief Adjust the value of External High Speed oscillator (HSE) used in your application.
+  *        This value is used by the RCC HAL module to compute the system frequency
+  *        (when HSE is used as system clock source, directly or through the PLL).  
+  */
+#if !defined  (HSE_VALUE) 
+  #define HSE_VALUE    ((uint32_t)8000000U) /*!< Value of the External oscillator in Hz */
+#endif /* HSE_VALUE */
+
+#if !defined  (HSE_STARTUP_TIMEOUT)
+  #define HSE_STARTUP_TIMEOUT    ((uint32_t)100U)   /*!< Time out for HSE start up, in ms */
+#endif /* HSE_STARTUP_TIMEOUT */
+
+/**
+  * @brief Internal Multiple Speed oscillator (MSI) default value.
+  *        This value is the default MSI range value after Reset.
+  */
+#if !defined  (MSI_VALUE)
+  #define MSI_VALUE    ((uint32_t)4194000U) /*!< Value of the Internal oscillator in Hz*/
+#endif /* MSI_VALUE */
+   
+/**
+  * @brief Internal High Speed oscillator (HSI) value.
+  *        This value is used by the RCC HAL module to compute the system frequency
+  *        (when HSI is used as system clock source, directly or through the PLL). 
+  */
+#if !defined  (HSI_VALUE)
+  #define HSI_VALUE    ((uint32_t)16000000U) /*!< Value of the Internal oscillator in Hz*/
+#endif /* HSI_VALUE */
+
+/**
+  * @brief Internal High Speed oscillator for USB (HSI48) value.
+  */
+#if !defined  (HSI48_VALUE) 
+#define HSI48_VALUE ((uint32_t)48000000U) /*!< Value of the Internal High Speed oscillator for USB in Hz.
+                                             The real value may vary depending on the variations
+                                             in voltage and temperature.  */
+#endif /* HSI48_VALUE */
+
+/**
+  * @brief Internal Low Speed oscillator (LSI) value.
+  */
+#if !defined  (LSI_VALUE) 
+ #define LSI_VALUE  ((uint32_t)37000U)       /*!< LSI Typical Value in Hz*/
+#endif /* LSI_VALUE */                      /*!< Value of the Internal Low Speed oscillator in Hz
+                                             The real value may vary depending on the variations
+                                             in voltage and temperature.*/   
+/**
+  * @brief External Low Speed oscillator (LSE) value.
+  *        This value is used by the UART, RTC HAL module to compute the system frequency
+  */
+#if !defined  (LSE_VALUE)
+  #define LSE_VALUE    ((uint32_t)32768U) /*!< Value of the External oscillator in Hz*/
+#endif /* LSE_VALUE */
+
+#if !defined  (LSE_STARTUP_TIMEOUT)
+  #define LSE_STARTUP_TIMEOUT  ((uint32_t)5000U)   /*!< Time out for LSE start up, in ms */
+#endif /* LSE_STARTUP_TIMEOUT */
+
+/* Tip: To avoid modifying this file each time you need to use different HSE,
+   ===  you can define the HSE value in your toolchain compiler preprocessor. */
+
+/* ########################### System Configuration ######################### */
+/**
+  * @brief This is the HAL system configuration section
+  */     
+#define  VDD_VALUE                    ((uint32_t)3300U) /*!< Value of VDD in mv */           
+#define  TICK_INT_PRIORITY            ((uint32_t)0U)    /*!< tick interrupt priority */            
+#define  USE_RTOS                     0U     
+#define  PREFETCH_ENABLE              0U              
+#define  PREREAD_ENABLE               1U
+#define  BUFFER_CACHE_DISABLE         0U
+
+/* ########################## Assert Selection ############################## */
+/**
+  * @brief Uncomment the line below to expanse the "assert_param" macro in the 
+  *        HAL drivers code
+  */
+/* #define USE_FULL_ASSERT    1U */
+
+/* Includes ------------------------------------------------------------------*/
+/**
+  * @brief Include module's header file 
+  */
+
+#ifdef HAL_RCC_MODULE_ENABLED
+  #include "stm32l0xx_hal_rcc.h"
+#endif /* HAL_RCC_MODULE_ENABLED */
+
+#ifdef HAL_EXTI_MODULE_ENABLED
+  #include "stm32l0xx_hal_exti.h"
+#endif /* HAL_EXTI_MODULE_ENABLED */
+
+#ifdef HAL_GPIO_MODULE_ENABLED
+  #include "stm32l0xx_hal_gpio.h"
+#endif /* HAL_GPIO_MODULE_ENABLED */
+
+#ifdef HAL_DMA_MODULE_ENABLED
+  #include "stm32l0xx_hal_dma.h"
+#endif /* HAL_DMA_MODULE_ENABLED */
+   
+#ifdef HAL_CORTEX_MODULE_ENABLED
+  #include "stm32l0xx_hal_cortex.h"
+#endif /* HAL_CORTEX_MODULE_ENABLED */
+
+#ifdef HAL_ADC_MODULE_ENABLED
+  #include "stm32l0xx_hal_adc.h"
+#endif /* HAL_ADC_MODULE_ENABLED */
+
+#ifdef HAL_COMP_MODULE_ENABLED
+  #include "stm32l0xx_hal_comp.h"
+#endif /* HAL_COMP_MODULE_ENABLED */
+   
+#ifdef HAL_CRC_MODULE_ENABLED
+  #include "stm32l0xx_hal_crc.h"
+#endif /* HAL_CRC_MODULE_ENABLED */
+
+#ifdef HAL_CRYP_MODULE_ENABLED
+  #include "stm32l0xx_hal_cryp.h"
+#endif /* HAL_CRYP_MODULE_ENABLED */
+
+#ifdef HAL_DAC_MODULE_ENABLED
+  #include "stm32l0xx_hal_dac.h"
+#endif /* HAL_DAC_MODULE_ENABLED */
+
+#ifdef HAL_FIREWALL_MODULE_ENABLED
+  #include "stm32l0xx_hal_firewall.h"
+#endif /* HAL_FIREWALL_MODULE_ENABLED */
+
+#ifdef HAL_FLASH_MODULE_ENABLED
+  #include "stm32l0xx_hal_flash.h"
+#endif /* HAL_FLASH_MODULE_ENABLED */
+ 
+#ifdef HAL_I2C_MODULE_ENABLED
+ #include "stm32l0xx_hal_i2c.h"
+#endif /* HAL_I2C_MODULE_ENABLED */
+
+#ifdef HAL_I2S_MODULE_ENABLED
+ #include "stm32l0xx_hal_i2s.h"
+#endif /* HAL_I2S_MODULE_ENABLED */
+
+#ifdef HAL_IWDG_MODULE_ENABLED
+ #include "stm32l0xx_hal_iwdg.h"
+#endif /* HAL_IWDG_MODULE_ENABLED */
+
+#ifdef HAL_LCD_MODULE_ENABLED
+ #include "stm32l0xx_hal_lcd.h"
+#endif /* HAL_LCD_MODULE_ENABLED */
+
+#ifdef HAL_LPTIM_MODULE_ENABLED
+#include "stm32l0xx_hal_lptim.h"
+#endif /* HAL_LPTIM_MODULE_ENABLED */
+   
+#ifdef HAL_PWR_MODULE_ENABLED
+ #include "stm32l0xx_hal_pwr.h"
+#endif /* HAL_PWR_MODULE_ENABLED */
+
+#ifdef HAL_RNG_MODULE_ENABLED
+ #include "stm32l0xx_hal_rng.h"
+#endif /* HAL_RNG_MODULE_ENABLED */
+
+#ifdef HAL_RTC_MODULE_ENABLED
+ #include "stm32l0xx_hal_rtc.h"
+
+#endif /* HAL_RTC_MODULE_ENABLED */
+
+#ifdef HAL_SPI_MODULE_ENABLED
+ #include "stm32l0xx_hal_spi.h"
+#endif /* HAL_SPI_MODULE_ENABLED */
+
+#ifdef HAL_TIM_MODULE_ENABLED
+ #include "stm32l0xx_hal_tim.h"
+#endif /* HAL_TIM_MODULE_ENABLED */
+
+#ifdef HAL_TSC_MODULE_ENABLED
+ #include "stm32l0xx_hal_tsc.h"
+#endif /* HAL_TSC_MODULE_ENABLED */
+
+#ifdef HAL_UART_MODULE_ENABLED
+ #include "stm32l0xx_hal_uart.h"
+#endif /* HAL_UART_MODULE_ENABLED */
+
+#ifdef HAL_USART_MODULE_ENABLED
+ #include "stm32l0xx_hal_usart.h"
+#endif /* HAL_USART_MODULE_ENABLED */
+
+#ifdef HAL_IRDA_MODULE_ENABLED
+ #include "stm32l0xx_hal_irda.h"
+#endif /* HAL_IRDA_MODULE_ENABLED */
+
+#ifdef HAL_SMARTCARD_MODULE_ENABLED
+ #include "stm32l0xx_hal_smartcard.h"
+#endif /* HAL_SMARTCARD_MODULE_ENABLED */
+
+#ifdef HAL_SMBUS_MODULE_ENABLED
+ #include "stm32l0xx_hal_smbus.h"
+#endif /* HAL_SMBUS_MODULE_ENABLED */
+
+#ifdef HAL_WWDG_MODULE_ENABLED
+ #include "stm32l0xx_hal_wwdg.h"
+#endif /* HAL_WWDG_MODULE_ENABLED */
+
+#ifdef HAL_PCD_MODULE_ENABLED
+ #include "stm32l0xx_hal_pcd.h"
+#endif /* HAL_PCD_MODULE_ENABLED */
+
+/* Exported macro ------------------------------------------------------------*/
+#ifdef  USE_FULL_ASSERT
+/**
+  * @brief  The assert_param macro is used for function's parameters check.
+  * @param  expr: If expr is false, it calls assert_failed function
+  *         which reports the name of the source file and the source
+  *         line number of the call that failed. 
+  *         If expr is true, it returns no value.
+  * @retval None
+  */
+  #define assert_param(expr) ((expr) ? (void)0U : assert_failed((uint8_t *)__FILE__, __LINE__))
+/* Exported functions ------------------------------------------------------- */
+  void assert_failed(uint8_t* file, uint32_t line);
+#else
+  #define assert_param(expr) ((void)0U)
+#endif /* USE_FULL_ASSERT */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __STM32L0xx_HAL_CONF_H */
+ 
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

bsp/stm32/stm32l053-st-nucleo/board/CubeMX_Config/Inc/stm32l0xx_it.h

+/**
+  ******************************************************************************
+  * @file    stm32l0xx_it.h
+  * @brief   This file contains the headers of the interrupt handlers.
+  ******************************************************************************
+  *
+  * COPYRIGHT(c) 2019 STMicroelectronics
+  *
+  * Redistribution and use in source and binary forms, with or without modification,
+  * are permitted provided that the following conditions are met:
+  *   1. Redistributions of source code must retain the above copyright notice,
+  *      this list of conditions and the following disclaimer.
+  *   2. Redistributions in binary form must reproduce the above copyright notice,
+  *      this list of conditions and the following disclaimer in the documentation
+  *      and/or other materials provided with the distribution.
+  *   3. Neither the name of STMicroelectronics nor the names of its contributors
+  *      may be used to endorse or promote products derived from this software
+  *      without specific prior written permission.
+  *
+  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+  *
+  ******************************************************************************
+  */
+
+/* Define to prevent recursive inclusion -------------------------------------*/
+#ifndef __STM32L0xx_IT_H
+#define __STM32L0xx_IT_H
+
+#ifdef __cplusplus
+ extern "C" {
+#endif 
+
+/* Includes ------------------------------------------------------------------*/
+#include "stm32l0xx_hal.h"
+#include "main.h"
+/* Exported types ------------------------------------------------------------*/
+/* Exported constants --------------------------------------------------------*/
+/* Exported macro ------------------------------------------------------------*/
+/* Exported functions ------------------------------------------------------- */
+
+void NMI_Handler(void);
+void HardFault_Handler(void);
+void SVC_Handler(void);
+void PendSV_Handler(void);
+void SysTick_Handler(void);
+void USART2_IRQHandler(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __STM32L0xx_IT_H */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

bsp/stm32/stm32l053-st-nucleo/board/CubeMX_Config/Src/main.c

+
+/**
+  ******************************************************************************
+  * @file           : main.c
+  * @brief          : Main program body
+  ******************************************************************************
+  ** This notice applies to any and all portions of this file
+  * that are not between comment pairs USER CODE BEGIN and
+  * USER CODE END. Other portions of this file, whether 
+  * inserted by the user or by software development tools
+  * are owned by their respective copyright owners.
+  *
+  * COPYRIGHT(c) 2019 STMicroelectronics
+  *
+  * Redistribution and use in source and binary forms, with or without modification,
+  * are permitted provided that the following conditions are met:
+  *   1. Redistributions of source code must retain the above copyright notice,
+  *      this list of conditions and the following disclaimer.
+  *   2. Redistributions in binary form must reproduce the above copyright notice,
+  *      this list of conditions and the following disclaimer in the documentation
+  *      and/or other materials provided with the distribution.
+  *   3. Neither the name of STMicroelectronics nor the names of its contributors
+  *      may be used to endorse or promote products derived from this software
+  *      without specific prior written permission.
+  *
+  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+  *
+  ******************************************************************************
+  */
+/* Includes ------------------------------------------------------------------*/
+#include "main.h"
+#include "stm32l0xx_hal.h"
+
+/* USER CODE BEGIN Includes */
+
+/* USER CODE END Includes */
+
+/* Private variables ---------------------------------------------------------*/
+UART_HandleTypeDef huart2;
+
+/* USER CODE BEGIN PV */
+/* Private variables ---------------------------------------------------------*/
+
+/* USER CODE END PV */
+
+/* Private function prototypes -----------------------------------------------*/
+void SystemClock_Config(void);
+static void MX_GPIO_Init(void);
+static void MX_USART2_UART_Init(void);
+
+/* USER CODE BEGIN PFP */
+/* Private function prototypes -----------------------------------------------*/
+
+/* USER CODE END PFP */
+
+/* USER CODE BEGIN 0 */
+
+/* USER CODE END 0 */
+
+/**
+  * @brief  The application entry point.
+  *
+  * @retval None
+  */
+int main(void)
+{
+  /* USER CODE BEGIN 1 */
+
+  /* USER CODE END 1 */
+
+  /* MCU Configuration----------------------------------------------------------*/
+
+  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
+  HAL_Init();
+
+  /* USER CODE BEGIN Init */
+
+  /* USER CODE END Init */
+
+  /* Configure the system clock */
+  SystemClock_Config();
+
+  /* USER CODE BEGIN SysInit */
+
+  /* USER CODE END SysInit */
+
+  /* Initialize all configured peripherals */
+  MX_GPIO_Init();
+  MX_USART2_UART_Init();
+  /* USER CODE BEGIN 2 */
+  uint32_t hell0;
+hell0 = HAL_RCC_GetPCLK1Freq();
+//printf("hell0:%d",hell0);
+  /* USER CODE END 2 */
+
+  /* Infinite loop */
+  /* USER CODE BEGIN WHILE */
+  while (1)
+  {
+	HAL_UART_Transmit(&huart2, "hello\r\n", strlen("hello\r\n"), 10);
+HAL_Delay(1000);
+  /* USER CODE END WHILE */
+
+  /* USER CODE BEGIN 3 */
+
+  }
+  /* USER CODE END 3 */
+
+}
+
+/**
+  * @brief System Clock Configuration
+  * @retval None
+  */
+void SystemClock_Config(void)
+{
+
+  RCC_OscInitTypeDef RCC_OscInitStruct;
+  RCC_ClkInitTypeDef RCC_ClkInitStruct;
+  RCC_PeriphCLKInitTypeDef PeriphClkInit;
+
+    /**Configure the main internal regulator output voltage 
+    */
+  __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
+
+    /**Initializes the CPU, AHB and APB busses clocks 
+    */
+  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
+  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
+  RCC_OscInitStruct.HSICalibrationValue = 16;
+  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
+  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
+  RCC_OscInitStruct.PLL.PLLMUL = RCC_PLLMUL_4;
+  RCC_OscInitStruct.PLL.PLLDIV = RCC_PLLDIV_2;
+  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
+  {
+    _Error_Handler(__FILE__, __LINE__);
+  }
+
+    /**Initializes the CPU, AHB and APB busses clocks 
+    */
+  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
+                              |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
+  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
+  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
+  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
+  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
+
+  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK)
+  {
+    _Error_Handler(__FILE__, __LINE__);
+  }
+
+  PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USART2;
+  PeriphClkInit.Usart2ClockSelection = RCC_USART2CLKSOURCE_PCLK1;
+  if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)
+  {
+    _Error_Handler(__FILE__, __LINE__);
+  }
+
+    /**Configure the Systick interrupt time 
+    */
+  HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);
+
+    /**Configure the Systick 
+    */
+  HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);
+
+  /* SysTick_IRQn interrupt configuration */
+  HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);
+}
+
+/* USART2 init function */
+static void MX_USART2_UART_Init(void)
+{
+
+  huart2.Instance = USART2;
+  huart2.Init.BaudRate = 115200;
+  huart2.Init.WordLength = UART_WORDLENGTH_8B;
+  huart2.Init.StopBits = UART_STOPBITS_1;
+  huart2.Init.Parity = UART_PARITY_NONE;
+  huart2.Init.Mode = UART_MODE_TX_RX;
+  huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE;
+  huart2.Init.OverSampling = UART_OVERSAMPLING_16;
+  huart2.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
+  huart2.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
+  if (HAL_UART_Init(&huart2) != HAL_OK)
+  {
+    _Error_Handler(__FILE__, __LINE__);
+  }
+
+}
+
+/** Configure pins as 
+        * Analog 
+        * Input 
+        * Output
+        * EVENT_OUT
+        * EXTI
+*/
+static void MX_GPIO_Init(void)
+{
+
+  GPIO_InitTypeDef GPIO_InitStruct;
+
+  /* GPIO Ports Clock Enable */
+  __HAL_RCC_GPIOC_CLK_ENABLE();
+  __HAL_RCC_GPIOH_CLK_ENABLE();
+  __HAL_RCC_GPIOA_CLK_ENABLE();
+
+  /*Configure GPIO pin Output Level */
+  HAL_GPIO_WritePin(LD2_GPIO_Port, LD2_Pin, GPIO_PIN_RESET);
+
+  /*Configure GPIO pin : B1_Pin */
+  GPIO_InitStruct.Pin = B1_Pin;
+  GPIO_InitStruct.Mode = GPIO_MODE_IT_FALLING;
+  GPIO_InitStruct.Pull = GPIO_NOPULL;
+  HAL_GPIO_Init(B1_GPIO_Port, &GPIO_InitStruct);
+
+  /*Configure GPIO pin : LD2_Pin */
+  GPIO_InitStruct.Pin = LD2_Pin;
+  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
+  GPIO_InitStruct.Pull = GPIO_NOPULL;
+  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
+  HAL_GPIO_Init(LD2_GPIO_Port, &GPIO_InitStruct);
+
+}
+
+/* USER CODE BEGIN 4 */
+
+/* USER CODE END 4 */
+
+/**
+  * @brief  This function is executed in case of error occurrence.
+  * @param  file: The file name as string.
+  * @param  line: The line in file as a number.
+  * @retval None
+  */
+void _Error_Handler(char *file, int line)
+{
+  /* USER CODE BEGIN Error_Handler_Debug */
+  /* User can add his own implementation to report the HAL error return state */
+  while(1)
+  {
+  }
+  /* USER CODE END Error_Handler_Debug */
+}
+
+#ifdef  USE_FULL_ASSERT
+/**
+  * @brief  Reports the name of the source file and the source line number
+  *         where the assert_param error has occurred.
+  * @param  file: pointer to the source file name
+  * @param  line: assert_param error line source number
+  * @retval None
+  */
+void assert_failed(uint8_t* file, uint32_t line)
+{ 
+  /* USER CODE BEGIN 6 */
+  /* User can add his own implementation to report the file name and line number,
+     tex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
+  /* USER CODE END 6 */
+}
+#endif /* USE_FULL_ASSERT */
+
+/**
+  * @}
+  */
+
+/**
+  * @}
+  */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

bsp/stm32/stm32l053-st-nucleo/board/CubeMX_Config/Src/stm32l0xx_hal_msp.c

+/**
+  ******************************************************************************
+  * File Name          : stm32l0xx_hal_msp.c
+  * Description        : This file provides code for the MSP Initialization 
+  *                      and de-Initialization codes.
+  ******************************************************************************
+  ** This notice applies to any and all portions of this file
+  * that are not between comment pairs USER CODE BEGIN and
+  * USER CODE END. Other portions of this file, whether 
+  * inserted by the user or by software development tools
+  * are owned by their respective copyright owners.
+  *
+  * COPYRIGHT(c) 2019 STMicroelectronics
+  *
+  * Redistribution and use in source and binary forms, with or without modification,
+  * are permitted provided that the following conditions are met:
+  *   1. Redistributions of source code must retain the above copyright notice,
+  *      this list of conditions and the following disclaimer.
+  *   2. Redistributions in binary form must reproduce the above copyright notice,
+  *      this list of conditions and the following disclaimer in the documentation
+  *      and/or other materials provided with the distribution.
+  *   3. Neither the name of STMicroelectronics nor the names of its contributors
+  *      may be used to endorse or promote products derived from this software
+  *      without specific prior written permission.
+  *
+  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+  *
+  ******************************************************************************
+  */
+/* Includes ------------------------------------------------------------------*/
+#include "stm32l0xx_hal.h"
+extern void _Error_Handler(char *, int);
+/* USER CODE BEGIN 0 */
+
+/* USER CODE END 0 */
+/**
+  * Initializes the Global MSP.
+  */
+void HAL_MspInit(void)
+{
+  /* USER CODE BEGIN MspInit 0 */
+
+  /* USER CODE END MspInit 0 */
+
+  __HAL_RCC_SYSCFG_CLK_ENABLE();
+  __HAL_RCC_PWR_CLK_ENABLE();
+
+  /* System interrupt init*/
+  /* SVC_IRQn interrupt configuration */
+  HAL_NVIC_SetPriority(SVC_IRQn, 0, 0);
+  /* PendSV_IRQn interrupt configuration */
+  HAL_NVIC_SetPriority(PendSV_IRQn, 0, 0);
+  /* SysTick_IRQn interrupt configuration */
+  HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);
+
+  /* USER CODE BEGIN MspInit 1 */
+
+  /* USER CODE END MspInit 1 */
+}
+
+void HAL_UART_MspInit(UART_HandleTypeDef* huart)
+{
+
+  GPIO_InitTypeDef GPIO_InitStruct;
+  if(huart->Instance==USART2)
+  {
+  /* USER CODE BEGIN USART2_MspInit 0 */
+
+  /* USER CODE END USART2_MspInit 0 */
+    /* Peripheral clock enable */
+    __HAL_RCC_USART2_CLK_ENABLE();
+  
+    /**USART2 GPIO Configuration    
+    PA2     ------> USART2_TX
+    PA3     ------> USART2_RX 
+    */
+    GPIO_InitStruct.Pin = USART_TX_Pin|USART_RX_Pin;
+    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
+    GPIO_InitStruct.Pull = GPIO_NOPULL;
+    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
+    GPIO_InitStruct.Alternate = GPIO_AF4_USART2;
+    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
+
+    /* USART2 interrupt Init */
+    HAL_NVIC_SetPriority(USART2_IRQn, 0, 0);
+    HAL_NVIC_EnableIRQ(USART2_IRQn);
+  /* USER CODE BEGIN USART2_MspInit 1 */
+
+  /* USER CODE END USART2_MspInit 1 */
+  }
+
+}
+
+void HAL_UART_MspDeInit(UART_HandleTypeDef* huart)
+{
+
+  if(huart->Instance==USART2)
+  {
+  /* USER CODE BEGIN USART2_MspDeInit 0 */
+
+  /* USER CODE END USART2_MspDeInit 0 */
+    /* Peripheral clock disable */
+    __HAL_RCC_USART2_CLK_DISABLE();
+  
+    /**USART2 GPIO Configuration    
+    PA2     ------> USART2_TX
+    PA3     ------> USART2_RX 
+    */
+    HAL_GPIO_DeInit(GPIOA, USART_TX_Pin|USART_RX_Pin);
+
+    /* USART2 interrupt DeInit */
+    HAL_NVIC_DisableIRQ(USART2_IRQn);
+  /* USER CODE BEGIN USART2_MspDeInit 1 */
+
+  /* USER CODE END USART2_MspDeInit 1 */
+  }
+
+}
+
+/* USER CODE BEGIN 1 */
+
+/* USER CODE END 1 */
+
+/**
+  * @}
+  */
+
+/**
+  * @}
+  */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

bsp/stm32/stm32l053-st-nucleo/board/CubeMX_Config/Src/stm32l0xx_it.c

+/**
+  ******************************************************************************
+  * @file    stm32l0xx_it.c
+  * @brief   Interrupt Service Routines.
+  ******************************************************************************
+  *
+  * COPYRIGHT(c) 2019 STMicroelectronics
+  *
+  * Redistribution and use in source and binary forms, with or without modification,
+  * are permitted provided that the following conditions are met:
+  *   1. Redistributions of source code must retain the above copyright notice,
+  *      this list of conditions and the following disclaimer.
+  *   2. Redistributions in binary form must reproduce the above copyright notice,
+  *      this list of conditions and the following disclaimer in the documentation
+  *      and/or other materials provided with the distribution.
+  *   3. Neither the name of STMicroelectronics nor the names of its contributors
+  *      may be used to endorse or promote products derived from this software
+  *      without specific prior written permission.
+  *
+  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+  *
+  ******************************************************************************
+  */
+/* Includes ------------------------------------------------------------------*/
+#include "stm32l0xx_hal.h"
+#include "stm32l0xx.h"
+#include "stm32l0xx_it.h"
+
+/* USER CODE BEGIN 0 */
+
+/* USER CODE END 0 */
+
+/* External variables --------------------------------------------------------*/
+extern UART_HandleTypeDef huart2;
+
+/******************************************************************************/
+/*            Cortex-M0+ Processor Interruption and Exception Handlers         */ 
+/******************************************************************************/
+
+/**
+* @brief This function handles Non maskable interrupt.
+*/
+void NMI_Handler(void)
+{
+  /* USER CODE BEGIN NonMaskableInt_IRQn 0 */
+
+  /* USER CODE END NonMaskableInt_IRQn 0 */
+  /* USER CODE BEGIN NonMaskableInt_IRQn 1 */
+
+  /* USER CODE END NonMaskableInt_IRQn 1 */
+}
+
+/**
+* @brief This function handles Hard fault interrupt.
+*/
+void HardFault_Handler(void)
+{
+  /* USER CODE BEGIN HardFault_IRQn 0 */
+
+  /* USER CODE END HardFault_IRQn 0 */
+  while (1)
+  {
+    /* USER CODE BEGIN W1_HardFault_IRQn 0 */
+    /* USER CODE END W1_HardFault_IRQn 0 */
+  }
+  /* USER CODE BEGIN HardFault_IRQn 1 */
+
+  /* USER CODE END HardFault_IRQn 1 */
+}
+
+/**
+* @brief This function handles System service call via SWI instruction.
+*/
+void SVC_Handler(void)
+{
+  /* USER CODE BEGIN SVC_IRQn 0 */
+
+  /* USER CODE END SVC_IRQn 0 */
+  /* USER CODE BEGIN SVC_IRQn 1 */
+
+  /* USER CODE END SVC_IRQn 1 */
+}
+
+/**
+* @brief This function handles Pendable request for system service.
+*/
+void PendSV_Handler(void)
+{
+  /* USER CODE BEGIN PendSV_IRQn 0 */
+
+  /* USER CODE END PendSV_IRQn 0 */
+  /* USER CODE BEGIN PendSV_IRQn 1 */
+
+  /* USER CODE END PendSV_IRQn 1 */
+}
+
+/**
+* @brief This function handles System tick timer.
+*/
+void SysTick_Handler(void)
+{
+  /* USER CODE BEGIN SysTick_IRQn 0 */
+
+  /* USER CODE END SysTick_IRQn 0 */
+  HAL_IncTick();
+  HAL_SYSTICK_IRQHandler();
+  /* USER CODE BEGIN SysTick_IRQn 1 */
+
+  /* USER CODE END SysTick_IRQn 1 */
+}
+
+/******************************************************************************/
+/* STM32L0xx Peripheral Interrupt Handlers                                    */
+/* Add here the Interrupt Handlers for the used peripherals.                  */
+/* For the available peripheral interrupt handler names,                      */
+/* please refer to the startup file (startup_stm32l0xx.s).                    */
+/******************************************************************************/
+
+/**
+* @brief This function handles USART2 global interrupt / USART2 wake-up interrupt through EXTI line 26.
+*/
+void USART2_IRQHandler(void)
+{
+  /* USER CODE BEGIN USART2_IRQn 0 */
+
+  /* USER CODE END USART2_IRQn 0 */
+  HAL_UART_IRQHandler(&huart2);
+  /* USER CODE BEGIN USART2_IRQn 1 */
+
+  /* USER CODE END USART2_IRQn 1 */
+}
+
+/* USER CODE BEGIN 1 */
+
+/* USER CODE END 1 */
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

bsp/stm32/stm32l053-st-nucleo/board/CubeMX_Config/Src/system_stm32l0xx.c

+/**
+  ******************************************************************************
+  * @file    system_stm32l0xx.c
+  * @author  MCD Application Team
+  * @brief   CMSIS Cortex-M0+ Device Peripheral Access Layer System Source File.
+  *
+  *   This file provides two functions and one global variable to be called from 
+  *   user application:
+  *      - SystemInit(): This function is called at startup just after reset and 
+  *                      before branch to main program. This call is made inside
+  *                      the "startup_stm32l0xx.s" file.
+  *
+  *      - SystemCoreClock variable: Contains the core clock (HCLK), it can be used
+  *                                  by the user application to setup the SysTick 
+  *                                  timer or configure other parameters.
+  *                                     
+  *      - SystemCoreClockUpdate(): Updates the variable SystemCoreClock and must
+  *                                 be called whenever the core clock is changed
+  *                                 during program execution.
+  *
+  *
+  ******************************************************************************
+  * @attention
+  *
+  * <h2><center>&copy; COPYRIGHT(c) 2016 STMicroelectronics</center></h2>
+  *
+  * Redistribution and use in source and binary forms, with or without modification,
+  * are permitted provided that the following conditions are met:
+  *   1. Redistributions of source code must retain the above copyright notice,
+  *      this list of conditions and the following disclaimer.
+  *   2. Redistributions in binary form must reproduce the above copyright notice,
+  *      this list of conditions and the following disclaimer in the documentation
+  *      and/or other materials provided with the distribution.
+  *   3. Neither the name of STMicroelectronics nor the names of its contributors
+  *      may be used to endorse or promote products derived from this software
+  *      without specific prior written permission.
+  *
+  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+  *
+  ******************************************************************************
+  */
+
+/** @addtogroup CMSIS
+  * @{
+  */
+
+/** @addtogroup stm32l0xx_system
+  * @{
+  */  
+  
+/** @addtogroup STM32L0xx_System_Private_Includes
+  * @{
+  */
+
+#include "stm32l0xx.h"
+
+#if !defined  (HSE_VALUE) 
+  #define HSE_VALUE    ((uint32_t)8000000U) /*!< Value of the External oscillator in Hz */
+#endif /* HSE_VALUE */
+
+#if !defined  (MSI_VALUE)
+  #define MSI_VALUE    ((uint32_t)2000000U) /*!< Value of the Internal oscillator in Hz*/
+#endif /* MSI_VALUE */
+   
+#if !defined  (HSI_VALUE)
+  #define HSI_VALUE    ((uint32_t)16000000U) /*!< Value of the Internal oscillator in Hz*/
+#endif /* HSI_VALUE */
+
+
+/**
+  * @}
+  */
+
+/** @addtogroup STM32L0xx_System_Private_TypesDefinitions
+  * @{
+  */
+
+/**
+  * @}
+  */
+
+/** @addtogroup STM32L0xx_System_Private_Defines
+  * @{
+  */
+/************************* Miscellaneous Configuration ************************/
+
+/*!< Uncomment the following line if you need to relocate your vector Table in
+     Internal SRAM. */
+/* #define VECT_TAB_SRAM */
+#define VECT_TAB_OFFSET  0x00U /*!< Vector Table base offset field. 
+                                   This value must be a multiple of 0x200. */
+/******************************************************************************/
+/**
+  * @}
+  */
+
+/** @addtogroup STM32L0xx_System_Private_Macros
+  * @{
+  */
+
+/**
+  * @}
+  */
+
+/** @addtogroup STM32L0xx_System_Private_Variables
+  * @{
+  */
+  /* This variable is updated in three ways:
+      1) by calling CMSIS function SystemCoreClockUpdate()
+      2) by calling HAL API function HAL_RCC_GetHCLKFreq()
+      3) each time HAL_RCC_ClockConfig() is called to configure the system clock frequency 
+         Note: If you use this function to configure the system clock; then there
+               is no need to call the 2 first functions listed above, since SystemCoreClock
+               variable is updated automatically.
+  */
+  uint32_t SystemCoreClock = 2000000U;
+  const uint8_t AHBPrescTable[16] = {0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 1U, 2U, 3U, 4U, 6U, 7U, 8U, 9U};
+  const uint8_t APBPrescTable[8] = {0U, 0U, 0U, 0U, 1U, 2U, 3U, 4U};
+  const uint8_t PLLMulTable[9] = {3U, 4U, 6U, 8U, 12U, 16U, 24U, 32U, 48U};
+
+/**
+  * @}
+  */
+
+/** @addtogroup STM32L0xx_System_Private_FunctionPrototypes
+  * @{
+  */
+
+/**
+  * @}
+  */
+
+/** @addtogroup STM32L0xx_System_Private_Functions
+  * @{
+  */
+
+/**
+  * @brief  Setup the microcontroller system.
+  * @param  None
+  * @retval None
+  */
+void SystemInit (void)
+{    
+/*!< Set MSION bit */
+  RCC->CR |= (uint32_t)0x00000100U;
+
+  /*!< Reset SW[1:0], HPRE[3:0], PPRE1[2:0], PPRE2[2:0], MCOSEL[2:0] and MCOPRE[2:0] bits */
+  RCC->CFGR &= (uint32_t) 0x88FF400CU;
+ 
+  /*!< Reset HSION, HSIDIVEN, HSEON, CSSON and PLLON bits */
+  RCC->CR &= (uint32_t)0xFEF6FFF6U;
+  
+  /*!< Reset HSI48ON  bit */
+  RCC->CRRCR &= (uint32_t)0xFFFFFFFEU;
+  
+  /*!< Reset HSEBYP bit */
+  RCC->CR &= (uint32_t)0xFFFBFFFFU;
+
+  /*!< Reset PLLSRC, PLLMUL[3:0] and PLLDIV[1:0] bits */
+  RCC->CFGR &= (uint32_t)0xFF02FFFFU;
+
+  /*!< Disable all interrupts */
+  RCC->CIER = 0x00000000U;
+  
+  /* Configure the Vector Table location add offset address ------------------*/
+#ifdef VECT_TAB_SRAM
+  SCB->VTOR = SRAM_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal SRAM */
+#else
+  SCB->VTOR = FLASH_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal FLASH */
+#endif
+}
+
+/**
+  * @brief  Update SystemCoreClock according to Clock Register Values
+  *         The SystemCoreClock variable contains the core clock (HCLK), it can
+  *         be used by the user application to setup the SysTick timer or configure
+  *         other parameters.
+  *           
+  * @note   Each time the core clock (HCLK) changes, this function must be called
+  *         to update SystemCoreClock variable value. Otherwise, any configuration
+  *         based on this variable will be incorrect.         
+  *     
+  * @note   - The system frequency computed by this function is not the real 
+  *           frequency in the chip. It is calculated based on the predefined 
+  *           constant and the selected clock source:
+  *             
+  *           - If SYSCLK source is MSI, SystemCoreClock will contain the MSI 
+  *             value as defined by the MSI range.
+  *                                   
+  *           - If SYSCLK source is HSI, SystemCoreClock will contain the HSI_VALUE(*)
+  *                                              
+  *           - If SYSCLK source is HSE, SystemCoreClock will contain the HSE_VALUE(**)
+  *                          
+  *           - If SYSCLK source is PLL, SystemCoreClock will contain the HSE_VALUE(**)
+  *             or HSI_VALUE(*) multiplied/divided by the PLL factors.
+  *         
+  *         (*) HSI_VALUE is a constant defined in stm32l0xx_hal.h file (default value
+  *             16 MHz) but the real value may vary depending on the variations
+  *             in voltage and temperature.   
+  *    
+  *         (**) HSE_VALUE is a constant defined in stm32l0xx_hal.h file (default value
+  *              8 MHz), user has to ensure that HSE_VALUE is same as the real
+  *              frequency of the crystal used. Otherwise, this function may
+  *              have wrong result.
+  *                
+  *         - The result of this function could be not correct when using fractional
+  *           value for HSE crystal.
+  * @param  None
+  * @retval None
+  */
+void SystemCoreClockUpdate (void)
+{
+  uint32_t tmp = 0U, pllmul = 0U, plldiv = 0U, pllsource = 0U, msirange = 0U;
+
+  /* Get SYSCLK source -------------------------------------------------------*/
+  tmp = RCC->CFGR & RCC_CFGR_SWS;
+  
+  switch (tmp)
+  {
+    case 0x00U:  /* MSI used as system clock */
+      msirange = (RCC->ICSCR & RCC_ICSCR_MSIRANGE) >> 13U;
+      SystemCoreClock = (32768U * (1U << (msirange + 1U)));
+      break;
+    case 0x04U:  /* HSI used as system clock */
+      SystemCoreClock = HSI_VALUE;
+      break;
+    case 0x08U:  /* HSE used as system clock */
+      SystemCoreClock = HSE_VALUE;
+      break;
+    case 0x0CU:  /* PLL used as system clock */
+      /* Get PLL clock source and multiplication factor ----------------------*/
+      pllmul = RCC->CFGR & RCC_CFGR_PLLMUL;
+      plldiv = RCC->CFGR & RCC_CFGR_PLLDIV;
+      pllmul = PLLMulTable[(pllmul >> 18U)];
+      plldiv = (plldiv >> 22U) + 1U;
+      
+      pllsource = RCC->CFGR & RCC_CFGR_PLLSRC;
+
+      if (pllsource == 0x00U)
+      {
+        /* HSI oscillator clock selected as PLL clock entry */
+        SystemCoreClock = (((HSI_VALUE) * pllmul) / plldiv);
+      }
+      else
+      {
+        /* HSE selected as PLL clock entry */
+        SystemCoreClock = (((HSE_VALUE) * pllmul) / plldiv);
+      }
+      break;
+    default: /* MSI used as system clock */
+      msirange = (RCC->ICSCR & RCC_ICSCR_MSIRANGE) >> 13U;
+      SystemCoreClock = (32768U * (1U << (msirange + 1U)));
+      break;
+  }
+  /* Compute HCLK clock frequency --------------------------------------------*/
+  /* Get HCLK prescaler */
+  tmp = AHBPrescTable[((RCC->CFGR & RCC_CFGR_HPRE) >> 4U)];
+  /* HCLK clock frequency */
+  SystemCoreClock >>= tmp;
+}
+
+
+
+/**
+  * @}
+  */
+
+/**
+  * @}
+  */
+
+/**
+  * @}
+  */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

bsp/stm32/stm32l053-st-nucleo/board/Kconfig

+menu "Hardware Drivers Config"
+
+config SOC_STM32L053R8
+    bool
+    select SOC_SERIES_STM32L0
+    default y
+
+menu "Onboard Peripheral Drivers"
+
+    config BSP_USING_USB_TO_USART
+        bool "Enable USB TO USART (uart2)"
+        select BSP_USING_UART2
+        default y
+
+endmenu
+
+menu "On-chip Peripheral Drivers"
+
+    config BSP_USING_GPIO
+        bool "Enable GPIO"
+        select RT_USING_PIN
+        default y
+
+    menuconfig BSP_USING_UART
+        bool "Enable UART"
+        default y
+        select RT_USING_SERIAL
+        if BSP_USING_UART
+            config BSP_USING_UART2
+                bool "Enable UART2"
+                default y
+				
+            config BSP_UART2_RX_USING_DMA
+                bool "Enable UART2 RX DMA"
+                depends on BSP_USING_UART2 && RT_SERIAL_USING_DMA
+                default n
+        endif
+
+endmenu
+
+menu "Board extended module Drivers"
+
+endmenu
+
+endmenu

bsp/stm32/stm32l053-st-nucleo/board/SConscript

+import os
+import rtconfig
+from building import *
+
+Import('SDK_LIB')
+
+cwd = GetCurrentDir()
+
+# add general drivers
+src = Split('''
+board.c
+CubeMX_Config/Src/stm32l0xx_hal_msp.c
+''')
+
+path =  [cwd]
+path += [cwd + '/CubeMX_Config/Inc']
+
+startup_path_prefix = SDK_LIB
+
+if rtconfig.CROSS_TOOL == 'gcc':
+    src += [startup_path_prefix + '/STM32L0xx_HAL/CMSIS/Device/ST/STM32L0xx/Source/Templates/gcc/startup_stm32l053xx.s']
+elif rtconfig.CROSS_TOOL == 'keil':
+    src += [startup_path_prefix + '/STM32L0xx_HAL/CMSIS/Device/ST/STM32L0xx/Source/Templates/arm/startup_stm32l053xx.s']
+elif rtconfig.CROSS_TOOL == 'iar':
+    src += [startup_path_prefix + '/STM32L0xx_HAL/CMSIS/Device/ST/STM32L0xx/Source/Templates/iar/startup_stm32l053xx.s']
+
+# STM32L052xx || STM32L053xx || STM32L062xx
+# STM32L063xx || STM32L072xx || STM32L073xx
+# STM32L082xx ||  STM32L083xx
+# You can select chips from the list above	
+CPPDEFINES = ['STM32L053xx']
+group = DefineGroup('Drivers', src, depend = [''], CPPPATH = path, CPPDEFINES = CPPDEFINES)
+
+Return('group')
\ No newline at end of file

bsp/stm32/stm32l053-st-nucleo/board/board.c

+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2018-11-06     SummerGift   first version
+ */
+
+#include "board.h"
+
+void SystemClock_Config(void)
+{
+
+  RCC_OscInitTypeDef RCC_OscInitStruct;
+  RCC_ClkInitTypeDef RCC_ClkInitStruct;
+  RCC_PeriphCLKInitTypeDef PeriphClkInit;
+
+    /**Configure the main internal regulator output voltage 
+    */
+  __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
+
+    /**Initializes the CPU, AHB and APB busses clocks 
+    */
+  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
+  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
+  RCC_OscInitStruct.HSICalibrationValue = 16;
+  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
+  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
+  RCC_OscInitStruct.PLL.PLLMUL = RCC_PLLMUL_4;
+  RCC_OscInitStruct.PLL.PLLDIV = RCC_PLLDIV_2;
+  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
+  {
+    _Error_Handler(__FILE__, __LINE__);
+  }
+
+    /**Initializes the CPU, AHB and APB busses clocks 
+    */
+  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
+                              |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
+  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
+  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
+  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
+  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
+
+  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK)
+  {
+    _Error_Handler(__FILE__, __LINE__);
+  }
+
+  PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USART2;
+  PeriphClkInit.Usart2ClockSelection = RCC_USART2CLKSOURCE_PCLK1;
+  if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)
+  {
+    _Error_Handler(__FILE__, __LINE__);
+  }
+
+    /**Configure the Systick interrupt time 
+    */
+  HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);
+
+    /**Configure the Systick 
+    */
+  HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);
+
+  /* SysTick_IRQn interrupt configuration */
+  HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);
+}

bsp/stm32/stm32l053-st-nucleo/board/board.h

+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2018-11-06     SummerGift   first version
+ */
+
+#ifndef __BOARD_H__
+#define __BOARD_H__
+
+#include <rtthread.h>
+#include <stm32l0xx.h>
+#include "drv_common.h"
+#include "drv_gpio.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define STM32_FLASH_START_ADRESS     ((uint32_t)0x08000000)
+#define STM32_FLASH_SIZE             (64 * 1024)
+#define STM32_FLASH_END_ADDRESS      ((uint32_t)(STM32_FLASH_START_ADRESS + STM32_FLASH_SIZE))
+
+/* Internal SRAM memory size[Kbytes] <8-64>, Default: 36 */
+#define STM32_SRAM_SIZE      8
+#define STM32_SRAM_END       (0x20000000 + STM32_SRAM_SIZE * 1024)
+
+#ifdef __CC_ARM
+extern int Image$$RW_IRAM1$$ZI$$Limit;
+#define HEAP_BEGIN      ((void *)&Image$$RW_IRAM1$$ZI$$Limit)
+#elif __ICCARM__
+#pragma section="CSTACK"
+#define HEAP_BEGIN      (__segment_end("CSTACK"))
+#else
+extern int __bss_end;
+#define HEAP_BEGIN      ((void *)&__bss_end)
+#endif
+
+#define HEAP_END        STM32_SRAM_END
+
+void SystemClock_Config(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __BOARD_H__ */

bsp/stm32/stm32l053-st-nucleo/board/linker_scripts/link.icf

+/*###ICF### Section handled by ICF editor, don't touch! ****/
+/*-Editor annotation file-*/
+/* IcfEditorFile="$TOOLKIT_DIR$\config\ide\IcfEditor\cortex_v1_0.xml" */
+/*-Specials-*/
+define symbol __ICFEDIT_intvec_start__ = 0x08000000;
+/*-Memory Regions-*/
+define symbol __ICFEDIT_region_ROM_start__    = 0x08000000;
+define symbol __ICFEDIT_region_ROM_end__      = 0x0800FFFF;
+define symbol __ICFEDIT_region_RAM_start__    = 0x20000000;
+define symbol __ICFEDIT_region_RAM_end__      = 0x20001FFF;
+
+/*-Sizes-*/
+define symbol __ICFEDIT_size_cstack__ = 0x0400;
+define symbol __ICFEDIT_size_heap__   = 0x0000;
+/**** End of ICF editor section. ###ICF###*/
+
+define memory mem with size = 4G;
+define region ROM_region      = mem:[from __ICFEDIT_region_ROM_start__   to __ICFEDIT_region_ROM_end__];
+define region RAM_region      = mem:[from __ICFEDIT_region_RAM_start__   to __ICFEDIT_region_RAM_end__];
+
+define block CSTACK    with alignment = 8, size = __ICFEDIT_size_cstack__   { };
+
+initialize by copy { readwrite };
+do not initialize  { section .noinit };
+
+place at address mem:__ICFEDIT_intvec_start__ { readonly section .intvec };
+
+place in ROM_region   { readonly };
+place in RAM_region   { readwrite, last block CSTACK};
\ No newline at end of file

bsp/stm32/stm32l053-st-nucleo/board/linker_scripts/link.lds

+/*
+ * linker script for STM32L4XX with GNU ld
+ */
+
+/* Program Entry, set to mark it as "used" and avoid gc */
+MEMORY
+{
+    ROM (rx) : ORIGIN = 0x08000000, LENGTH = 64k /* 64KB flash */
+    RAM (rw) : ORIGIN = 0x20000000, LENGTH =  8k  /* 8KB sram */
+}
+ENTRY(Reset_Handler)
+_system_stack_size = 0x200;
+
+SECTIONS
+{
+    .text :
+    {
+        . = ALIGN(4);
+        _stext = .;
+        KEEP(*(.isr_vector))            /* Startup code */
+
+        . = ALIGN(4);
+        *(.text)                        /* remaining code */
+        *(.text.*)                      /* remaining code */
+        *(.rodata)                      /* read-only data (constants) */
+        *(.rodata*)
+        *(.glue_7)
+        *(.glue_7t)
+        *(.gnu.linkonce.t*)
+
+        /* section information for finsh shell */
+        . = ALIGN(4);
+        __fsymtab_start = .;
+        KEEP(*(FSymTab))
+        __fsymtab_end = .;
+
+        . = ALIGN(4);
+        __vsymtab_start = .;
+        KEEP(*(VSymTab))
+        __vsymtab_end = .;
+
+        /* section information for initial. */
+        . = ALIGN(4);
+        __rt_init_start = .;
+        KEEP(*(SORT(.rti_fn*)))
+        __rt_init_end = .;
+
+        . = ALIGN(4);
+        _etext = .;
+    } > ROM = 0
+
+    /* .ARM.exidx is sorted, so has to go in its own output section.  */
+    __exidx_start = .;
+    .ARM.exidx :
+    {
+        *(.ARM.exidx* .gnu.linkonce.armexidx.*)
+
+        /* This is used by the startup in order to initialize the .data secion */
+        _sidata = .;
+    } > ROM
+    __exidx_end = .;
+
+    /* .data section which is used for initialized data */
+
+    .data : AT (_sidata)
+    {
+        . = ALIGN(4);
+        /* This is used by the startup in order to initialize the .data secion */
+        _sdata = . ;
+
+        *(.data)
+        *(.data.*)
+        *(.gnu.linkonce.d*)
+
+        . = ALIGN(4);
+        /* This is used by the startup in order to initialize the .data secion */
+        _edata = . ;
+    } > RAM
+
+    .stack : 
+    {
+        . = ALIGN(4);
+        _sstack = .;
+        . = . + _system_stack_size;
+        . = ALIGN(4);
+        _estack = .;
+    } > RAM
+
+    __bss_start = .;
+    .bss :
+    {
+        . = ALIGN(4);
+        /* This is used by the startup in order to initialize the .bss secion */
+        _sbss = .;
+
+        *(.bss)
+        *(.bss.*)
+        *(COMMON)
+
+        . = ALIGN(4);
+        /* This is used by the startup in order to initialize the .bss secion */
+        _ebss = . ;
+        
+        *(.bss.init)
+    } > RAM
+    __bss_end = .;
+
+    _end = .;
+
+    /* Stabs debugging sections.  */
+    .stab          0 : { *(.stab) }
+    .stabstr       0 : { *(.stabstr) }
+    .stab.excl     0 : { *(.stab.excl) }
+    .stab.exclstr  0 : { *(.stab.exclstr) }
+    .stab.index    0 : { *(.stab.index) }
+    .stab.indexstr 0 : { *(.stab.indexstr) }
+    .comment       0 : { *(.comment) }
+    /* DWARF debug sections.
+     * Symbols in the DWARF debugging sections are relative to the beginning
+     * of the section so we begin them at 0.  */
+    /* DWARF 1 */
+    .debug          0 : { *(.debug) }
+    .line           0 : { *(.line) }
+    /* GNU DWARF 1 extensions */
+    .debug_srcinfo  0 : { *(.debug_srcinfo) }
+    .debug_sfnames  0 : { *(.debug_sfnames) }
+    /* DWARF 1.1 and DWARF 2 */
+    .debug_aranges  0 : { *(.debug_aranges) }
+    .debug_pubnames 0 : { *(.debug_pubnames) }
+    /* DWARF 2 */
+    .debug_info     0 : { *(.debug_info .gnu.linkonce.wi.*) }
+    .debug_abbrev   0 : { *(.debug_abbrev) }
+    .debug_line     0 : { *(.debug_line) }
+    .debug_frame    0 : { *(.debug_frame) }
+    .debug_str      0 : { *(.debug_str) }
+    .debug_loc      0 : { *(.debug_loc) }
+    .debug_macinfo  0 : { *(.debug_macinfo) }
+    /* SGI/MIPS DWARF 2 extensions */
+    .debug_weaknames 0 : { *(.debug_weaknames) }
+    .debug_funcnames 0 : { *(.debug_funcnames) }
+    .debug_typenames 0 : { *(.debug_typenames) }
+    .debug_varnames  0 : { *(.debug_varnames) }
+}

bsp/stm32/stm32l053-st-nucleo/board/linker_scripts/link.sct

+; *************************************************************
+; *** Scatter-Loading Description File generated by uVision ***
+; *************************************************************
+
+LR_IROM1 0x08000000 0x00010000  {    ; load region size_region
+  ER_IROM1 0x08000000 0x00010000  {  ; load address = execution address
+   *.o (RESET, +First)
+   *(InRoot$$Sections)
+   .ANY (+RO)
+   .ANY (+XO)
+  }
+  RW_IRAM1 0x20000000 0x00002000  {  ; RW data
+   .ANY (+RW +ZI)
+  }
+}
+

bsp/stm32/stm32l053-st-nucleo/project.eww

+<?xml version="1.0" encoding="iso-8859-1"?>
+
+<workspace>
+  <project>
+    <path>$WS_DIR$\project.ewp</path>
+  </project>
+  <batchBuild/>
+</workspace>
+
+

bsp/stm32/stm32l053-st-nucleo/rtconfig.h

+#ifndef RT_CONFIG_H__
+#define RT_CONFIG_H__
+
+/* Automatically generated file; DO NOT EDIT. */
+/* RT-Thread Configuration */
+
+/* RT-Thread Kernel */
+
+#define RT_NAME_MAX 8
+#define RT_ALIGN_SIZE 4
+#define RT_THREAD_PRIORITY_32
+#define RT_THREAD_PRIORITY_MAX 32
+#define RT_TICK_PER_SECOND 1000
+#define RT_USING_OVERFLOW_CHECK
+#define RT_USING_HOOK
+#define RT_USING_IDLE_HOOK
+#define RT_IDEL_HOOK_LIST_SIZE 4
+#define IDLE_THREAD_STACK_SIZE 256
+#define RT_DEBUG
+
+/* Inter-Thread communication */
+
+#define RT_USING_SEMAPHORE
+#define RT_USING_MUTEX
+#define RT_USING_EVENT
+#define RT_USING_MAILBOX
+#define RT_USING_MESSAGEQUEUE
+
+/* Memory Management */
+
+#define RT_USING_MEMPOOL
+#define RT_USING_SMALL_MEM
+#define RT_USING_HEAP
+
+/* Kernel Device Object */
+
+#define RT_USING_DEVICE
+#define RT_USING_CONSOLE
+#define RT_CONSOLEBUF_SIZE 256
+#define RT_CONSOLE_DEVICE_NAME "uart2"
+#define RT_VER_NUM 0x40000
+#define ARCH_ARM
+#define ARCH_ARM_CORTEX_M
+#define ARCH_ARM_CORTEX_M0
+
+/* RT-Thread Components */
+
+#define RT_USING_COMPONENTS_INIT
+#define RT_USING_USER_MAIN
+#define RT_MAIN_THREAD_STACK_SIZE 2048
+#define RT_MAIN_THREAD_PRIORITY 10
+
+/* C++ features */
+
+
+/* Command shell */
+
+#define RT_USING_FINSH
+#define FINSH_THREAD_NAME "tshell"
+#define FINSH_USING_HISTORY
+#define FINSH_HISTORY_LINES 5
+#define FINSH_USING_SYMTAB
+#define FINSH_USING_DESCRIPTION
+#define FINSH_THREAD_PRIORITY 20
+#define FINSH_THREAD_STACK_SIZE 1024
+#define FINSH_CMD_SIZE 80
+#define FINSH_USING_MSH
+#define FINSH_USING_MSH_DEFAULT
+#define FINSH_USING_MSH_ONLY
+#define FINSH_ARG_MAX 10
+
+/* Device virtual file system */
+
+
+/* Device Drivers */
+
+#define RT_USING_DEVICE_IPC
+#define RT_PIPE_BUFSZ 512
+#define RT_USING_SERIAL
+#define RT_SERIAL_USING_DMA
+#define RT_USING_PIN
+
+/* Using WiFi */
+
+
+/* Using USB */
+
+
+/* POSIX layer and C standard library */
+
+
+/* Network */
+
+/* Socket abstraction layer */
+
+
+/* light weight TCP/IP stack */
+
+
+/* Modbus master and slave stack */
+
+
+/* AT commands */
+
+
+/* VBUS(Virtual Software BUS) */
+
+
+/* Utilities */
+
+
+/* ARM CMSIS */
+
+
+/* RT-Thread online packages */
+
+/* IoT - internet of things */
+
+
+/* Wi-Fi */
+
+/* Marvell WiFi */
+
+
+/* Wiced WiFi */
+
+
+/* IoT Cloud */
+
+
+/* security packages */
+
+
+/* language packages */
+
+
+/* multimedia packages */
+
+
+/* tools packages */
+
+
+/* system packages */
+
+
+/* peripheral libraries and drivers */
+
+
+/* miscellaneous packages */
+
+
+/* sample package */
+
+/* samples: kernel and components samples */
+
+
+/* example package: hello */
+
+#define SOC_FAMILY_STM32
+#define SOC_SERIES_STM32L0
+
+/* Hardware Drivers Config */
+
+#define SOC_STM32L053R8
+
+/* Onboard Peripheral Drivers */
+
+#define BSP_USING_USB_TO_USART
+
+/* On-chip Peripheral Drivers */
+
+#define BSP_USING_GPIO
+#define BSP_USING_UART
+#define BSP_USING_UART2
+
+/* Board extended module Drivers */
+
+
+#endif

bsp/stm32/stm32l053-st-nucleo/template.eww

+<?xml version="1.0" encoding="iso-8859-1"?>
+
+<workspace>
+  <project>
+    <path>$WS_DIR$\template.ewp</path>
+  </project>
+  <batchBuild/>
+</workspace>
+
+